/************************************************************************** * * Copyright (c) 2020-2022 Diality Inc. - All Rights Reserved. * * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER. * * @file ModeChemicalDisinfect.c * * @author (last) Bill Bracken * @date (last) 22-Aug-2022 * * @author (original) Sean * @date (original) 04-Apr-2020 * ***************************************************************************/ #include "ConcentratePumps.h" #include "ConductivitySensors.h" #include "DrainPump.h" #include "Heaters.h" #include "LoadCell.h" #include "MessageSupport.h" #include "ModeChemicalDisinfect.h" #include "ModeFault.h" #include "ModeStandby.h" #include "NVDataMgmt.h" #include "OperationModes.h" #include "Pressures.h" #include "Reservoirs.h" #include "ROPump.h" #include "RTC.h" #include "SystemCommMessages.h" #include "TaskGeneral.h" #include "TemperatureSensors.h" #include "Timers.h" #include "UVReactors.h" #include "Valves.h" #include "CPLD.h" /** * @addtogroup DGChemicalDisinfectMode * @{ */ // ********** private definitions ********** // General defines #define MAX_ALLOWED_STATE_TRIALS 1 ///< Max allowed trials on a state. This is general among all the states. #define CHEM_DISINFECT_DATA_PUB_INTERVAL ( MS_PER_SECOND / TASK_GENERAL_INTERVAL ) ///< Mode chem Disinfect data publish interval in counts. // Start state defines #define MIN_INLET_PRESSURE_PSI 30.0F ///< Minimum water inlet pressure in psi. #define MAX_START_STATE_TEMP_SENSORS_DIFF_C 3.0F ///< Max start state TDi and TRo difference tolerance in C. // Drain R1 & R2 states defines #define DRAIN_PUMP_TARGET_RPM 2400 ///< Drain pump target RPM during drain. #define RSRVRS_INITIAL_DRAIN_TIME_OUT_MS ( 2 * SEC_PER_MIN * MS_PER_SECOND ) ///< Reservoirs 1 & 2 initial drain time out in milliseconds. #define DRAIN_WEIGHT_UNCHANGE_TIMEOUT ( 6 * MS_PER_SECOND ) ///< Time period of unchanged weight during draining before timeout. // Flush drain path state defines #define FLUSH_DRAIN_WAIT_TIME_MS ( SEC_PER_MIN * MS_PER_SECOND ) ///< Flush Drain path wait time in milliseconds. #define MIN_INLET_TEMPERATURE_C 15.0F ///< Minimum water inlet temperature in C. TODO original temperature was 25 C #define MAX_INLET_CONDUCTIVITY_US_PER_CM 2000.0F ///< Maximum water inlet conductivity in us/cm // Flush circulation path state defines #define RO_PUMP_TARGET_FLUSH_FILL_FLOW_RATE_LPM 0.8F ///< RO pump target flow rate during flush/fill in L/min. #define MAX_RO_PUMP_FLUSH_FILL_PRESSURE_PSI 130 ///< Maximum RO pump pressure during flush/fill states in psi. #define FLUSH_CICRCULATION_WAIT_TIME_MS ( 30 * MS_PER_SECOND ) ///< Flush/rinse circulation path wait time in milliseconds. #define MAX_FLUSH_CIRC_TEMP_SENSOR_DIFF_C 3.0F ///< Maximum flush circulation temperature difference tolerance in C. #define NUM_OF_TEMP_SENSORS_TO_AVG 4.0F ///< Number of temperature sensors to average to check the difference. // Flush and drain R1 and R2 #define RSRVRS_FULL_VOL_ML 1850.0F ///< Reservoirs 1 & 2 full volume in mL. TODo original value was 1900 #define RSRVRS_PARTIAL_FILL_VOL_ML 500.0F ///< Reservoirs 1 & 2 partial volume in mL. #define RSRVRS_FULL_STABLE_TIME_COUNT ( ( 4 * MS_PER_SECOND ) / TASK_GENERAL_INTERVAL ) ///< Reservoirs 1 & 2 full stable time in counts. #define RSRVRS_FILL_UP_TIMEOUT_MS ( 5 * SEC_PER_MIN * MS_PER_SECOND ) ///< Reservoirs 1 & 2 full fill up timeout in ms. #define RSRVRS_500ML_FILL_UP_TIMEOUT_MS ( 2 * SEC_PER_MIN * MS_PER_SECOND ) ///< Reservoirs 1 & 2 partial fill up timeout in ms. #define RSRVRS_DRAIN_TIMEOUT_MS ( 2 * SEC_PER_MIN * MS_PER_SECOND ) ///< Reservoirs 1 & 2 drain timeout in ms. // R1 to R2 & R2 to R1 chemical disinfect circulation #define CHEM_DISINFECT_TARGET_RO_FLOW_LPM 0.8F ///< Chemical disinfect target RO flow rate in L/min. #define CHEM_DISINFECT_MAX_RO_PRESSURE_PSI 130 ///< Chemical disinfect maximum RO pressure in psi. #define CHEM_DISINFECT_TARGET_DRAIN_PRES_PSI 12.0 ///< Chemical disinfect target drain outlet pressure in psi. #define CHEM_DISINFECT_TIME_MS ( 36 * SEC_PER_MIN * MS_PER_SECOND ) ///< Chemical disinfect time for each section in milliseconds. TODO original time was 36 minutes #define CHEM_DISINFECT_START_TEMP_TIMOUT_MS ( 4 * MIN_PER_HOUR * SEC_PER_MIN * MS_PER_SECOND ) ///< Chemical disinfect reaching to minimum temperature timeout in milliseconds. #define RSRVRS_TARGET_VOL_OUT_TIMEOUT_MS ( 0.5F * SEC_PER_MIN * MS_PER_SECOND ) ///< Reservoirs 1 & 2 maximum volume out of range timeout during chemical disinfect. TODO change this to 5 seconds #define RSRVRS_MAX_TARGET_VOL_CHANGE_ML 600.0F ///< Reservoirs 1 & 2 maximum allowed volume change when full during chemical disinfect. TODO original value is 100 mL #define POST_CHEM_DISINFECT_WAIT_TIME_MS ( 1 * SEC_PER_MIN * MS_PER_SECOND ) ///< Chemical disinfect final wait time before flushing the system in milliseconds. // Prime acid line #define PRIME_ACID_LINE_TIMEOUT_MS ( 2 * SEC_PER_MIN * MS_PER_SECOND ) ///< Priming acid line timeout in milliseconds. #define CONC_PUMP_PRIME_SPEED_ML_PER_MIN 40.0F ///< Concentrate pump prime speed in ml/min. #define MIN_ACID_CONDUCTIVITY_US_PER_CM 2000.0F ///< Minimum conductivity that indicates acid is in the line in uS/cm. #define PRIME_ACID_STEADY_CONDUCTIVITY_TIME_MS ( ( 2 * MS_PER_SECOND ) / TASK_GENERAL_INTERVAL ) ///< Minimum time that a steady conductivity of acid must be read in milliseconds. // Fill with disinfectant and water #define MIN_RO_FLOW_FOR_CONC_PUMP_MIXING_LPM 0.3F ///< Minimum RO flow rate that is need to be able to turn on the concentrate pump for mixing. // Fill heat up #define CHEM_DISINFECT_TARGET_TEMPERATURE_C 21.0F ///< Chemical disinfect target water temperature in C. // TODO this used to 30.0 // Post disinfect rinses #define NUM_OF_POST_DISINFECT_RINSES 12 ///< Number of rinses after a chemical disinfect. static const F32 ACID_TO_WATER_MIXING_RATIO = ( 1.0F / 70.0F ); ///< Acid to water mixing ratio for chemical disinfect. /// Cancellation paths typedef enum Cancellation_modes { CANCELLATION_MODE_NONE = 0, ///< Cancellation mode none. CANCELLATION_MODE_BASIC, ///< Cancellation mode basic. CANCELLATION_MODE_WATER, ///< Cancellation mode water. CANCELLATION_MODE_CHEMICAL, ///< Cancellation mode chemical. NUM_OF_CANCELLATION_MODES ///< Number of cancellation modes. } CANCELLATION_MODE_T; /// Chemical disinfect status typedef enum Chemical_disinfect_status { CHEM_DISINFECT_IN_PROGRESS = 0, ///< Chemical disinfect in progress. CHEM_DISINFECT_RSRVRS_LEAK_TIMEOUT, ///< Chemical disinfect reservoirs leak timeout. CHEM_DISINFECT_HEAT_UP_TIMEOUT, ///< Chemical disinfect heat up timeout. CHEM_DISINFECT_COMPLETE, ///< Chemical disinfect complete. NUM_OF_CHEM_DISINFECT_STATUS ///< Number of chemical disinfect status. } CHEM_DISINFECT_STATUS_T; // ********** private data ********** static DG_CHEM_DISINFECT_STATE_T chemDisinfectState = DG_CHEM_DISINFECT_STATE_START; ///< Currently active chemical disinfect state. static DG_CHEM_DISINFECT_STATE_T prevChemDisinfectState = DG_CHEM_DISINFECT_STATE_START; ///< Previous active heat disinfect state before alarm. static DG_CHEM_DISINFECT_UI_STATE_T chemDisinfectUIState = CHEM_DISINFECT_UI_STATE_NOT_RUNNING; ///< Currently active chemical disinfect UI state. static U32 overallChemDisinfectTimer = 0; ///< Chemical disinfect cycle total timer. static U32 stateTimer = 0; ///< Chemical disinfect state timer to be used in different states. static U32 stateTrialCounter = 0; ///< Chemical disinfect state trial counter to be used for retries in different states. static BOOL areTempSensorsInRange = FALSE; ///< Chemical disinfect temperature sensors in/out range flag. /// Boolean flag to check whether draining R1 and R2 is at the end of the chemical disinfect cycle or in the beginning. So the drain states can be reused. static BOOL isThisLastDrain = FALSE; static DG_RESERVOIR_STATUS_T rsrvr1Status = NUM_OF_DG_RESERVOIR_STATUS; ///< Reservoir 1 status. static DG_RESERVOIR_STATUS_T rsrvr2Status = NUM_OF_DG_RESERVOIR_STATUS; ///< Reservoir 2 status. static F32 R1ChemDisinfectVol = 0.0; ///< Reservoir 1 full volume during chemical disinfect. static F32 R2ChemDisinfectVol = 0.0; ///< Reservoir 2 full volume during chemical disinfect. static U32 chemDisinfectTimer = 0; ///< Chemical disinfect timer. static BOOL isPartialDisinfectInProgress = FALSE; ///< Chemical disinfect partial complete/in progess flag. static U32 rsrvrsVolMonitorTimer = 0; ///< Reservoir 1 & 2 volume monitor timers during chemical disinfect. static BOOL areRsrvrsLeaking = FALSE; ///< Reservoir 1 & 2 leak check flag during chemical disinfect. static U32 dataPublishCounter = 0; ///< Chemical Disinfect data publish counter. static CANCELLATION_MODE_T cancellationMode = CANCELLATION_MODE_NONE; ///< Cancellation mode. static U32 rsrvrFillStableTimeCounter; ///< Reservoirs fill stable time counter. static ALARM_ID_T alarmDetectedPendingTrigger; ///< Chemical disinfect alarm to raise. static U32 numberOfPostDisinfectRinses; ///< Number of times to rinse the fluid path after chemical disinfect. static U32 primeAcidSteadyStateCounter = 0; ///< Prime acid steady state counter. static BOOL haveDrainParamsBeenInit[ NUM_OF_DG_RESERVOIRS ]; ///< Boolean flag to indicate whether the drain parameters have been reset or not. // ********** private function prototypes ********** static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectStartState( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectDrainR1State( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectDrainR2State( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFlushDrainState( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFlushCirculationState( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFlushR1AndR2State( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFlushR2AndDrainR1State( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFlushDrainR2State( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFlushDrainR1State( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectPrimeAcidLineState( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFillWithWaterAndDisinfectantState( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectRemoveAcidBottleFromUIState( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectDisinfectR1ToR2State( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFillR2WithDisinfectantState( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectDisinfectR2ToR1State( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectCoolDownHeatersState( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectDisinfectantDrainR1State( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectDisinfectantDrainR2State( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectRinseR1ToR2State( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectRinseR2ToR1AndDrainR1State( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectRinseR1ToR2AndDrainR2State( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectRinseCirculationState( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectCancelModeBasicPathState( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectCancelModeWaterPathState( void ); static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectCompleteState( void ); static void failChemicalDisinfect( void ); static DG_RESERVOIR_STATUS_T getRsrvrFillStatus( DG_RESERVOIR_ID_T r, F32 targetVol, U32 timeout ); static DG_RESERVOIR_STATUS_T getRsrvrDrainStatus( DG_RESERVOIR_ID_T r, U32 drainSteadyStateTimeout, U32 timeout ); static CHEM_DISINFECT_STATUS_T getChemicalDisinfectStatus( void ); static void publishChemicalDisinfectData( void ); static void monitorModeChemicalDisinfect( void ); /*********************************************************************//** * @brief * The initChemicalDisinfectMode function initializes the chemical * disinfect mode module. * @details Inputs: none * @details Outputs: chemDisinfectState, stateTimer, isThisLastDrain, * stateTrialCounter, areTempSensorsInRange, rsrvr1Status, rsrvr2Status, * R1ChemDisinfectVol, R2ChemDisinfectVol, overallChemDisinfectTimer, * cancellationMode, rsrvrFillStableTimeCounter, prevChemDisinfectState * isPartialDisinfectInProgress, numberOfPostDisinfectRinses, * primeAcidSteadyStateCounter, chemDisinfectUIState, haveDrainParamsBeenInit * @return none *************************************************************************/ void initChemicalDisinfectMode( void ) { chemDisinfectState = DG_CHEM_DISINFECT_STATE_START; prevChemDisinfectState = DG_CHEM_DISINFECT_STATE_START; stateTimer = 0; isThisLastDrain = FALSE; stateTrialCounter = 0; areTempSensorsInRange = FALSE; rsrvr1Status = NUM_OF_DG_RESERVOIR_STATUS; rsrvr2Status = NUM_OF_DG_RESERVOIR_STATUS; R1ChemDisinfectVol = 0.0; R2ChemDisinfectVol = 0.0; overallChemDisinfectTimer = 0; cancellationMode = CANCELLATION_MODE_NONE; rsrvrFillStableTimeCounter = 0; isPartialDisinfectInProgress = FALSE; numberOfPostDisinfectRinses = 0; primeAcidSteadyStateCounter = 0; chemDisinfectUIState = CHEM_DISINFECT_UI_STATE_NOT_RUNNING; haveDrainParamsBeenInit[ DG_RESERVOIR_1 ] = FALSE; haveDrainParamsBeenInit[ DG_RESERVOIR_2 ] = FALSE; } /*********************************************************************//** * @brief * The transitionToChemicalDisinfectMode function prepares for transition to * chemical disinfect mode. * @details Inputs: none * @details Outputs: chemical disisnfect mode variables are reset * @return initial state *************************************************************************/ U32 transitionToChemicalDisinfectMode( void ) { deenergizeActuators(); initChemicalDisinfectMode(); setCPLDCleanLEDColor( CPLD_CLEAN_LED_YELLOW ); return chemDisinfectState; } /*********************************************************************//** * @brief * The execChemicalDisinfectMode function executes the chemical disinfect * mode state machine. * @details Inputs: none * @details Outputs: Chemical disinfect mode state machine executed * @return current state of chemical disinfect mode *************************************************************************/ U32 execChemicalDisinfectMode( void ) { monitorModeChemicalDisinfect(); switch ( chemDisinfectState ) { case DG_CHEM_DISINFECT_STATE_START: chemDisinfectState = handleChemicalDisinfectStartState(); break; case DG_CHEM_DISINFECT_STATE_DRAIN_R1: chemDisinfectState = handleChemicalDisinfectDrainR1State(); break; case DG_CHEM_DISINFECT_STATE_DRAIN_R2: chemDisinfectState = handleChemicalDisinfectDrainR2State(); break; case DG_CHEM_DISINFECT_STATE_FLUSH_DRAIN: chemDisinfectState = handleChemicalDisinfectFlushDrainState(); break; case DG_CHEM_DISINFECT_STATE_FLUSH_CIRCULATION: chemDisinfectState = handleChemicalDisinfectFlushCirculationState(); break; case DG_CHEM_DISINFECT_STATE_FLUSH_R1_AND_R2: chemDisinfectState = handleChemicalDisinfectFlushR1AndR2State(); break; case DG_CHEM_DISINFECT_STATE_FLUSH_R2_AND_DRAIN_R1: chemDisinfectState = handleChemicalDisinfectFlushR2AndDrainR1State(); break; case DG_CHEM_DISINFECT_STATE_FLUSH_DRAIN_R2: chemDisinfectState = handleChemicalDisinfectFlushDrainR2State(); break; case DG_CHEM_DISINFECT_STATE_FLUSH_DRAIN_R1: chemDisinfectState = handleChemicalDisinfectFlushDrainR1State(); break; case DG_CHEM_DISINFECT_STATE_PRIME_ACID_LINE: chemDisinfectState = handleChemicalDisinfectPrimeAcidLineState(); break; case DG_CHEM_DISINFECT_STATE_FILL_WITH_WATER_AND_DISINFECTANT: chemDisinfectState = handleChemicalDisinfectFillWithWaterAndDisinfectantState(); break; case DG_CHEM_DISINFECT_STATE_REMOVE_ACID_BOTTLE_FROM_UI: chemDisinfectState = handleChemicalDisinfectRemoveAcidBottleFromUIState(); break; case DG_CHEM_DISINFECT_STATE_DISINFECT_R1_TO_R2: chemDisinfectState = handleChemicalDisinfectDisinfectR1ToR2State(); break; case DG_CHEM_DISINFECT_STATE_FILL_R2_WITH_DISINFECTANT: chemDisinfectState = handleChemicalDisinfectFillR2WithDisinfectantState(); break; case DG_CHEM_DISINFECT_STATE_DISINFECT_R2_TO_R1: chemDisinfectState = handleChemicalDisinfectDisinfectR2ToR1State(); break; case DG_CHEM_DISINFECT_STATE_COOL_DOWN_HEATERS: chemDisinfectState = handleChemicalDisinfectCoolDownHeatersState(); break; case DG_CHEM_DISINFECT_STATE_DISINFECTANT_DRAIN_R1: chemDisinfectState = handleChemicalDisinfectDisinfectantDrainR1State(); break; case DG_CHEM_DISINFECT_STATE_DISINFECTANT_DRAIN_R2: chemDisinfectState = handleChemicalDisinfectDisinfectantDrainR2State(); break; case DG_CHEM_DISINFECT_STATE_RINSE_R1_TO_R2: chemDisinfectState = handleChemicalDisinfectRinseR1ToR2State(); break; case DG_CHEM_DISINFECT_STATE_RINSE_R2_TO_R1_AND_DRAIN_R1: chemDisinfectState = handleChemicalDisinfectRinseR2ToR1AndDrainR1State(); break; case DG_CHEM_DISINFECT_STATE_RINSE_R1_TO_R2_AND_DRAIN_R2: chemDisinfectState = handleChemicalDisinfectRinseR1ToR2AndDrainR2State(); break; case DG_CHEM_DISINFECT_STATE_RINSE_CIRCULATION: chemDisinfectState = handleChemicalDisinfectRinseCirculationState(); break; case DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH: chemDisinfectState = handleChemicalDisinfectCancelModeBasicPathState(); break; case DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH: chemDisinfectState = handleChemicalDisinfectCancelModeWaterPathState(); break; case DG_CHEM_DISINFECT_STATE_COMPLETE: chemDisinfectState = handleChemicalDisinfectCompleteState(); break; default: SET_ALARM_WITH_2_U32_DATA( ALARM_ID_DG_SOFTWARE_FAULT, SW_FAULT_ID_DG_CHEM_DISINFECT_INVALID_EXEC_STATE, chemDisinfectState ) chemDisinfectState = DG_CHEM_DISINFECT_STATE_START; break; } publishChemicalDisinfectData(); return chemDisinfectState; } /*********************************************************************//** * @brief * The getCurrentChemicalDisinfectState function returns the current state * of the chemical disinfect mode. * @details Inputs: chemState * @details Outputs: none * @return current state of chemical disinfect mode *************************************************************************/ DG_CHEM_DISINFECT_STATE_T getCurrentChemicalDisinfectState( void ) { return chemDisinfectState; } /*********************************************************************//** * @brief * The stopChemicalDisinfect function stops chemical disinfect mode. * @details Inputs: none * @details Outputs: none * @return TRUE is current operation mode is chemical disinfect, * otherwise FALSE *************************************************************************/ BOOL stopChemicalDisinfect( void ) { BOOL status = FALSE; // Check if the current operation mode is chemical disinfect if ( DG_MODE_CHEM == getCurrentOperationMode() ) { // Transition to mode standby requestNewOperationMode( DG_MODE_STAN ); status = TRUE; } return status; } // ********** private functions ********** /*********************************************************************//** * @brief * The handleChemicalDisinfectStartState function handles the chemical * disinfect start state. The state checks the inlet pressure and the * difference in between TDi and TRo sensors and if they are not in * range, it transitions to basic cancellation path. Otherwise, it * transitions to the next state. * @details Inputs: alarm, rsrvrFillStableTimeCounter, rsrvr1Status, * stateTimer * @details Outputs: alarm, rsrvrFillStableTimeCounter, rsrvr1Status, * stateTimer, chemDisinfectUIState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectStartState( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_DRAIN_R1; // Set the chemical disinfect that is published on the UI chemDisinfectUIState = CHEM_DISINFECT_UI_STATE_NOT_RUNNING; // Start overall chemical disinfect timer overallChemDisinfectTimer = getMSTimerCount(); // Set all the actuators to reset and de-energized state deenergizeActuators(); F32 ppiPressure = getMeasuredDGPressure( PRESSURE_SENSOR_RO_PUMP_INLET ); F32 THdTemp = getTemperatureValue( TEMPSENSORS_HEAT_DISINFECT ); F32 TPoTemp = getTemperatureValue( TEMPSENSORS_OUTLET_PRIMARY_HEATER ); // If the inlet pressure is less than the threshold and TDi and TRo difference is greater than 3 C, the cycle should be canceled if ( ( ppiPressure < MIN_INLET_PRESSURE_PSI ) && ( fabs( THdTemp - TPoTemp ) > MAX_START_STATE_TEMP_SENSORS_DIFF_C ) ) { prevChemDisinfectState = state; alarmDetectedPendingTrigger = ALARM_ID_DG_CHEM_DISINFECT_INLET_PRES_AND_TEMP_SNSRS_OUT; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } else { // Close VPi to prevent wasting water setValveState( VPI, VALVE_STATE_CLOSED ); // Set the actuators to drain R1 setValveState( VRD1, VALVE_STATE_OPEN ); setDrainPumpTargetRPM( DRAIN_PUMP_TARGET_RPM ); rsrvrFillStableTimeCounter = 0; // Assume reservoir 1 is full and drain it rsrvr1Status = DG_RESERVOIR_ABOVE_TARGET; stateTimer = getMSTimerCount(); } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectDrainR1State function handles the chemical * disinfect drain R1 state. The state drains reservoir 1. If the * transition is finished within the time, it transitions to the next state, * otherwise, it transitions to basic cancellation path. * @details Inputs: stateTimer, rsrvr1Status, rsrvr2Status, isThisLastDrain * @details Outputs: stateTimer, rsrvr1Status, rsrvr2Status, * chemDisinfectUIState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectDrainR1State( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_DRAIN_R1; // Set the chemical disinfect that is published on the UI chemDisinfectUIState = CHEM_DISINFECT_UI_STATE_FLUSH_BEFORE_DISINFECT; if ( DG_RESERVOIR_ABOVE_TARGET == rsrvr1Status ) { rsrvr1Status = getRsrvrDrainStatus( DG_RESERVOIR_1, DRAIN_WEIGHT_UNCHANGE_TIMEOUT, RSRVRS_INITIAL_DRAIN_TIME_OUT_MS ); } else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr1Status ) { if ( TRUE == isThisLastDrain ) { // Set the chemical disinfect that is published on the UI // This is the final drain of chemical disinfect chemDisinfectUIState = CHEM_DISINFECT_UI_STATE_FLUSH_AFTER_DISINFECT; // Done with draining signalDrainPumpHardStop(); // Set the valves to flush the recirculation line setValveState( VPI, VALVE_STATE_OPEN ); setValveState( VPD, VALVE_STATE_OPEN_C_TO_NC ); // Done with draining R1 setValveState( VRD1, VALVE_STATE_CLOSED ); setValveState( VPO, VALVE_STATE_NOFILL_C_TO_NO ); setValveState( VDR, VALVE_STATE_DRAIN_C_TO_NO ); setValveState( VRC, VALVE_STATE_DRAIN_C_TO_NO ); // Set the RO pump to run at full pressure setROPumpTargetFlowRateLPM( RO_PUMP_TARGET_FLUSH_FILL_FLOW_RATE_LPM, MAX_RO_PUMP_FLUSH_FILL_PRESSURE_PSI ); // Done with final draining isThisLastDrain = FALSE; state = DG_CHEM_DISINFECT_STATE_RINSE_CIRCULATION; } else { // Assume reservoir 2 is full and drain it rsrvr2Status = DG_RESERVOIR_ABOVE_TARGET; tareLoadCell( LOAD_CELL_RESERVOIR_1_PRIMARY ); tareLoadCell( LOAD_CELL_RESERVOIR_1_BACKUP ); // Done with draining R1 setValveState( VRD1, VALVE_STATE_CLOSED ); setValveState( VRD2, VALVE_STATE_OPEN ); state = DG_CHEM_DISINFECT_STATE_DRAIN_R2; } // Start the timer stateTimer = getMSTimerCount(); } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr1Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectDrainR2State function handles the chemical * disinfect drain R2 state. The state drains reservoir 2. If the * transition is finished within the time, it transitions to the next * state, otherwise, it transitions to basic cancellation path. * @details Inputs: stateTimer, rsrvr2Status, isThisLastDrain, * stateTrialCounter * @details Outputs: stateTimer, rsrvr2Status, stateTrialCounter, * chemDisinfectUIState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectDrainR2State( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_DRAIN_R2; if ( DG_RESERVOIR_ABOVE_TARGET == rsrvr2Status ) { rsrvr2Status = getRsrvrDrainStatus( DG_RESERVOIR_2, DRAIN_WEIGHT_UNCHANGE_TIMEOUT, RSRVRS_INITIAL_DRAIN_TIME_OUT_MS ); } else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { if ( TRUE == isThisLastDrain ) { // Set the chemical disinfect that is published on the UI // This is the final drain of chemical disinfect chemDisinfectUIState = CHEM_DISINFECT_UI_STATE_FLUSH_AFTER_DISINFECT; setValveState( VRD1, VALVE_STATE_OPEN ); setValveState( VRD2, VALVE_STATE_CLOSED ); rsrvr1Status = DG_RESERVOIR_ABOVE_TARGET; state = DG_CHEM_DISINFECT_STATE_DRAIN_R1; } else { tareLoadCell( LOAD_CELL_RESERVOIR_2_PRIMARY ); tareLoadCell( LOAD_CELL_RESERVOIR_2_BACKUP ); signalDrainPumpHardStop(); setValveState( VRD2, VALVE_STATE_CLOSED ); setValveState( VPI, VALVE_STATE_OPEN ); stateTrialCounter = 0; stateTimer = getMSTimerCount(); state = DG_CHEM_DISINFECT_STATE_FLUSH_DRAIN; } } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectFlushDrainState function handles the chemical * disinfect flush drain state. The state flushes the drain line for a * period of time and then measures the temperature and conductivity of * water. If they are not within the range, it transitions to basic * cancellation path, otherwise it transitions to the next state. * @details Inputs: stateTimer, stateTrialCounter, alarm, * prevChemDisinfectState * @details Outputs: stateTimer, stateTrialCounter, alarm, * prevChemDisinfectState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFlushDrainState( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_FLUSH_DRAIN; // Check if flush time has elapsed if ( TRUE == didTimeout( stateTimer, FLUSH_DRAIN_WAIT_TIME_MS ) ) { BOOL hasConductivityPassed = FALSE; // If the inlet temperature and conductivity are in range, move onto the next state if ( ( getTemperatureValue( TEMPSENSORS_INLET_PRIMARY_HEATER ) > MIN_INLET_TEMPERATURE_C ) && ( getConductivityValue( CONDUCTIVITYSENSORS_CPI_SENSOR ) <= MAX_INLET_CONDUCTIVITY_US_PER_CM ) ) { hasConductivityPassed = TRUE; } #ifndef _RELEASE_ if ( SW_CONFIG_ENABLE_VALUE == getSoftwareConfigStatus( SW_CONFIG_DISABLE_DISINFECT_CONDUCTIVITY_CHECK ) ) { hasConductivityPassed = TRUE; } #endif if ( TRUE == hasConductivityPassed ) { setValveState( VPD, VALVE_STATE_OPEN_C_TO_NC ); setROPumpTargetFlowRateLPM( RO_PUMP_TARGET_FLUSH_FILL_FLOW_RATE_LPM, MAX_RO_PUMP_FLUSH_FILL_PRESSURE_PSI ); stateTimer = getMSTimerCount(); stateTrialCounter = 0; state = DG_CHEM_DISINFECT_STATE_FLUSH_CIRCULATION; } // If the number of failures have not exceeded the limit, try again. else if ( stateTrialCounter < MAX_ALLOWED_STATE_TRIALS ) { stateTrialCounter++; stateTimer = getMSTimerCount(); } // Couldn't get a good water sample after a couple of trials and the disinfect cycle failed else { alarmDetectedPendingTrigger = ALARM_ID_DG_CHEM_DISINFECT_INLET_COND_AND_TEMP_OUT; prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectFlushCirculationState function handles the * chemical disinfect flush circulation state. The state flushes the * circulation line for a period of time. After the flush if the temperature * sensors are not within a certain degrees from each other, the state * transitions to basic cancellation path, otherwise, it transitions to the * next state. * @details Inputs: stateTimer, stateTrialCounter, prevChemDisinfectState * alarm, areTempSensorsInRange, rsrvr1Status, rsrvr2Status * @details Outputs: stateTimer, stateTrialCounter, prevChemDisinfectState, * alarm, areTempSensorsInRange, rsrvr1Status, rsrvr2Status * @return next state of the chemical disinfect state machine ************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFlushCirculationState( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_FLUSH_CIRCULATION; // Check if the flush circulation time has elapsed and the temperature sensors are not in range yet if ( ( TRUE == didTimeout( stateTimer, FLUSH_CICRCULATION_WAIT_TIME_MS ) ) && ( FALSE == areTempSensorsInRange ) ) { F32 ThdTemp = getTemperatureValue( TEMPSENSORS_HEAT_DISINFECT ); F32 TPoTemp = getTemperatureValue( TEMPSENSORS_OUTLET_PRIMARY_HEATER ); F32 TD1Temp = getTemperatureValue( TEMPSENSORS_CONDUCTIVITY_SENSOR_1 ); F32 TD2Temp = getTemperatureValue( TEMPSENSORS_CONDUCTIVITY_SENSOR_2 ); F32 avgTemp = ( ThdTemp + TPoTemp + TD1Temp + TD2Temp ) / NUM_OF_TEMP_SENSORS_TO_AVG; // Check if any of the temperature sensors deviate for more than the defined value from the average of all // of the temperature sensors BOOL isThdOut = ( fabs( ThdTemp - avgTemp ) > MAX_FLUSH_CIRC_TEMP_SENSOR_DIFF_C ? TRUE : FALSE ); BOOL isTPoOut = ( fabs( TPoTemp - avgTemp ) > MAX_FLUSH_CIRC_TEMP_SENSOR_DIFF_C ? TRUE : FALSE ); BOOL isTD1Out = ( fabs( TD1Temp - avgTemp ) > MAX_FLUSH_CIRC_TEMP_SENSOR_DIFF_C ? TRUE : FALSE ); BOOL isTD2Out = ( fabs( TD2Temp - avgTemp ) > MAX_FLUSH_CIRC_TEMP_SENSOR_DIFF_C ? TRUE : FALSE ); // Check if any of the temperature sensors are out of tolerance if( ( TRUE == isThdOut ) || ( TRUE == isTPoOut ) || ( TRUE == isTD1Out ) || ( TRUE == isTD2Out ) ) { // Check if we have exceeded the number of trials. If not, try another time if ( ++stateTrialCounter < MAX_ALLOWED_STATE_TRIALS ) { stateTimer = getMSTimerCount(); } // State failed. Cancel chemical disinfect mode else { alarmDetectedPendingTrigger = ALARM_ID_DG_TEMP_SENSORS_DIFF_OUT_OF_RANGE; prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } } else { areTempSensorsInRange = TRUE; stateTimer = getMSTimerCount(); // Set the concentrate pump to run at a constant speed during priming in reverse setConcentratePumpTargetSpeed( CONCENTRATEPUMPS_CP1_ACID, -1.0F * CONC_PUMP_PRIME_SPEED_ML_PER_MIN ); requestConcentratePumpOn( CONCENTRATEPUMPS_CP1_ACID ); } } // Only start the concentrate pumps if the temperature sensors are in range if ( ( TRUE == areTempSensorsInRange ) && ( TRUE == didTimeout( stateTimer, FLUSH_CICRCULATION_WAIT_TIME_MS ) ) ) { rsrvr1Status = DG_RESERVOIR_BELOW_TARGET; rsrvr2Status = DG_RESERVOIR_BELOW_TARGET; // Turn off the concentrate pumps requestConcentratePumpOff( CONCENTRATEPUMPS_CP1_ACID ); setValveState( VPO, VALVE_STATE_FILL_C_TO_NC ); setValveState( VRF, VALVE_STATE_R1_C_TO_NC ); setValveState( VRI, VALVE_STATE_R2_C_TO_NC ); // Turn on the bicarb line with forward direction, to dispense the chemical and mix setConcentratePumpTargetSpeed( CONCENTRATEPUMPS_CP2_BICARB, CONC_PUMP_PRIME_SPEED_ML_PER_MIN ); requestConcentratePumpOn( CONCENTRATEPUMPS_CP2_BICARB ); stateTimer = getMSTimerCount(); state = DG_CHEM_DISINFECT_STATE_FLUSH_R1_AND_R2; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectFlushR1AndR2State function handles the * chemical disinfect flush reservoir 1 and reservoir 2 state. If the * reservoirs did not flush within a period time, the state transitions * to water cancellation path. * @details Inputs: stateTimer, rsrvr1Status, rsrvr2Status, * prevChemDisinfectState * @details Outputs: stateTimer, rsrvr1Status, rsrvr2Status, * prevChemDisinfectState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFlushR1AndR2State( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_FLUSH_R1_AND_R2; // If R1 is not full, keep monitoring for R1 level and timeout if ( DG_RESERVOIR_BELOW_TARGET == rsrvr1Status ) { rsrvr1Status = getRsrvrFillStatus( DG_RESERVOIR_1, RSRVRS_FULL_VOL_ML, RSRVRS_FILL_UP_TIMEOUT_MS ); // Keep monitoring the status of reservoir 2 at the same time rsrvr2Status = getRsrvrFillStatus( DG_RESERVOIR_2, RSRVRS_PARTIAL_FILL_VOL_ML, RSRVRS_500ML_FILL_UP_TIMEOUT_MS ); // Reservoir 2 cannot be filled before reservoir 1 is filled and is overflowing to reservoir 2. If reservoir 2 has already // reached to target volume, it means reservoir 1's load cell might be reading incorrect values. This situation might continue // until reservoir 2 is filled up and the tubing might expand or leak. if ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; alarmDetectedPendingTrigger = ALARM_ID_DG_INVALID_LOAD_CELL_VALUE; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } } // Once R1 is full, keep monitoring for R2 level and timeout else if( DG_RESERVOIR_REACHED_TARGET == rsrvr1Status ) { rsrvr2Status = getRsrvrFillStatus( DG_RESERVOIR_2, RSRVRS_PARTIAL_FILL_VOL_ML, RSRVRS_500ML_FILL_UP_TIMEOUT_MS ); // Once R2 is full (to 500mL in this case), transition to the next state if ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { // Set the actuators to flush R2 and drain R1 state setValveState( VRF, VALVE_STATE_R2_C_TO_NO ); setValveState( VRI, VALVE_STATE_R1_C_TO_NO ); setValveState( VRO, VALVE_STATE_R2_C_TO_NC ); setValveState( VRD1, VALVE_STATE_OPEN ); setDrainPumpTargetRPM( DRAIN_PUMP_TARGET_RPM ); stateTimer = getMSTimerCount(); // Set both reservoirs status rsrvr1Status = DG_RESERVOIR_ABOVE_TARGET; rsrvr2Status = DG_RESERVOIR_BELOW_TARGET; state = DG_CHEM_DISINFECT_STATE_FLUSH_R2_AND_DRAIN_R1; } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr1Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectFlushR2AndDrainR1State function handles the * chemical disinfect flush reservoir 2 and drain reservoir 1 state. The * state drains reservoir 1 and flushes reservoir 2 at the same time until * the water in reservoir 2 overflows to reservoir 1. If this process is * done within a certain period of time, it transitions to the next state. * If the drain process times out, it transitions to basic cancellation and * if the flush process times out, it transitions to water cancellation. * @details Inputs: stateTimer, rsrvr1Status, rsrvr2Status * @details Outputs: stateTimer, rsrvr1Status, rsrvr2Status, * prevChemDisinfectState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFlushR2AndDrainR1State( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_FLUSH_R2_AND_DRAIN_R1; // If reservoir 1 is empty, turn off the drain pump if ( DG_RESERVOIR_ABOVE_TARGET == rsrvr1Status ) { rsrvr1Status = getRsrvrDrainStatus( DG_RESERVOIR_1, DRAIN_WEIGHT_UNCHANGE_TIMEOUT, RSRVRS_INITIAL_DRAIN_TIME_OUT_MS ); } else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr1Status ) { // Done with draining R1 signalDrainPumpHardStop(); setValveState( VRD1, VALVE_STATE_CLOSED ); } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr1Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } // First reservoir 2 must be completely full if ( DG_RESERVOIR_BELOW_TARGET == rsrvr2Status ) { rsrvr2Status = getRsrvrFillStatus( DG_RESERVOIR_2, RSRVRS_FULL_VOL_ML, RSRVRS_FILL_UP_TIMEOUT_MS ); U32 drainPumpRPM = getDrainPumpTargetRPM(); // Keep monitoring the status of reservoir 1 as the same time F32 volume = getLoadCellSmallFilteredWeight( LOAD_CELL_RESERVOIR_1_PRIMARY ); // Reservoir 1 cannot be filled before reservoir 2 is filled and is overflowing to reservoir 1. If reservoir 1 has already // reached to target volume, it means reservoir 2's load cell might be reading incorrect values. This situation might continue // until reservoir 1 is filled up and the tubing might expand or leak. // Before checking whether reservoir 1 is filled pre-maturely, we have to make sure reservoir 1 is drained completely to make // sure the extra volume that is read is not because of previous water that is being drained currently and it is above 500 mL if ( ( volume >= RSRVRS_PARTIAL_FILL_VOL_ML ) && ( 0 == drainPumpRPM ) ) { prevChemDisinfectState = state; alarmDetectedPendingTrigger = ALARM_ID_DG_INVALID_LOAD_CELL_VALUE; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } } // Once R2 is full, R1 must be partially full else if( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { rsrvr1Status = getRsrvrFillStatus( DG_RESERVOIR_1, RSRVRS_PARTIAL_FILL_VOL_ML, RSRVRS_500ML_FILL_UP_TIMEOUT_MS ); // Once R1 is partially full, transition to the next state if ( DG_RESERVOIR_REACHED_TARGET == rsrvr1Status ) { // Done with filing turn off the RO pump signalROPumpHardStop(); // Set the valves to drain R2 and no fill setValveState( VPI, VALVE_STATE_CLOSED ); setValveState( VPD, VALVE_STATE_OPEN_C_TO_NC ); setValveState( VRD2, VALVE_STATE_OPEN ); setValveState( VPO, VALVE_STATE_NOFILL_C_TO_NO ); setValveState( VRO, VALVE_STATE_R1_C_TO_NO ); setDrainPumpTargetRPM( DRAIN_PUMP_TARGET_RPM ); // Start the timer for drain timeout stateTimer = getMSTimerCount(); rsrvr2Status = DG_RESERVOIR_ABOVE_TARGET; state = DG_CHEM_DISINFECT_STATE_FLUSH_DRAIN_R2; } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr1Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectFlushDrainR2State function handles the * chemical disinfect flush drain reservoir 2 state. The state drains * reservoir 2 and if the drain times out, it transitions to basic * cancellation. If the drain is finished within a certain period of time, * it transitions to the next state. * @details Inputs: stateTimer, rsrvr1Status, rsrvr2Status * @details Outputs: stateTimer, rsrvr1Status, rsrvr2Status, * prevChemDisinfectState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFlushDrainR2State( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_FLUSH_DRAIN_R2; // If reservoir 2 is empty, set the drain valve to drain R1 if ( DG_RESERVOIR_ABOVE_TARGET == rsrvr2Status ) { rsrvr2Status = getRsrvrDrainStatus( DG_RESERVOIR_2, DRAIN_WEIGHT_UNCHANGE_TIMEOUT, RSRVRS_INITIAL_DRAIN_TIME_OUT_MS ); } else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { setValveState( VRD1, VALVE_STATE_OPEN ); setValveState( VRD2, VALVE_STATE_CLOSED ); // Start the timer for drain timeout stateTimer = getMSTimerCount(); rsrvr1Status = DG_RESERVOIR_ABOVE_TARGET; state = DG_CHEM_DISINFECT_STATE_FLUSH_DRAIN_R1; } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectFlushDrainR1State function handles the * chemical disinfect flush drain reservoir 1 state. The state drains * reservoir 1 and if the drain times out, it transitions to basic * cancellation. If the drain is finished within a certain period of time, * it transitions to the next state. * @details Inputs: stateTimer, rsrvr1Status, rsrvr2Status * @details Outputs: stateTimer, rsrvr1Status, rsrvr2Status, * prevChemDisinfectState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFlushDrainR1State( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_FLUSH_DRAIN_R1; // If reservoir 1 is empty, set the state to fill water state if ( DG_RESERVOIR_ABOVE_TARGET == rsrvr1Status ) { rsrvr1Status = getRsrvrDrainStatus( DG_RESERVOIR_1, DRAIN_WEIGHT_UNCHANGE_TIMEOUT, RSRVRS_INITIAL_DRAIN_TIME_OUT_MS ); } else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr1Status ) { // Done with draining the reservoirs signalDrainPumpHardStop(); // Set the concentrate pump to run at a constant speed during priming setConcentratePumpTargetSpeed( CONCENTRATEPUMPS_CP2_BICARB, CONC_PUMP_PRIME_SPEED_ML_PER_MIN ); // The bicarb line is used to inject the acid into the fluid path during chemical disinfect requestConcentratePumpOn( CONCENTRATEPUMPS_CP2_BICARB ); // TODO why do we need to turn off CP2 while we are going to turn it on immediately? // Start the timer for drain timeout stateTimer = getMSTimerCount(); state = DG_CHEM_DISINFECT_STATE_PRIME_ACID_LINE; } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr1Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectPrimeAcidLineState function handles the * chemical disinfect prime acid line state. The state primes the acid line * until a minimum conductivity is sensed for a period of time. The the * function transitions to another state. If the minimum conductivity was * not reached within the defined period of time, it transition to a * cancellation path. * @details Inputs: stateTimer, primeAcidSteadyStateCounter * @details Outputs: stateTimer, rsrvr1Status, rsrvr2Status, * prevChemDisinfectState, primeAcidSteadyStateCounter, chemDisinfectUIState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectPrimeAcidLineState( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_PRIME_ACID_LINE; F32 cd2Conductivity = getConductivityValue( (U32)CONDUCTIVITYSENSORS_CD2_SENSOR ); // Set the chemical disinfect that is published on the UI chemDisinfectUIState = CHEM_DISINFECT_UI_STATE_MIX_WATER_AND_ACID; if ( cd2Conductivity <= MIN_ACID_CONDUCTIVITY_US_PER_CM ) { primeAcidSteadyStateCounter = 0; } else { // Check if the acid conductivity value has been if ( ++primeAcidSteadyStateCounter >= PRIME_ACID_STEADY_CONDUCTIVITY_TIME_MS ) { // Turn off the concentrate pump for now until there is sufficient RO flow to turn it // back for mixing requestConcentratePumpOff( CONCENTRATEPUMPS_CP2_BICARB ); // Prepare for filling the reservoirs and heating the water setValveState( VPI, VALVE_STATE_OPEN ); setValveState( VPD, VALVE_STATE_OPEN_C_TO_NC ); setValveState( VRD1, VALVE_STATE_CLOSED ); setValveState( VPO, VALVE_STATE_FILL_C_TO_NC ); setValveState( VRO, VALVE_STATE_R1_C_TO_NO ); setValveState( VRI, VALVE_STATE_R2_C_TO_NC ); setValveState( VRF, VALVE_STATE_R1_C_TO_NC ); // Turn on the RO pump setROPumpTargetFlowRateLPM( RO_PUMP_TARGET_FLUSH_FILL_FLOW_RATE_LPM, MAX_RO_PUMP_FLUSH_FILL_PRESSURE_PSI ); // Start heating the water while we are filling up the reservoirs setHeaterTargetTemperature( DG_PRIMARY_HEATER, CHEM_DISINFECT_TARGET_TEMPERATURE_C ); startHeater( DG_PRIMARY_HEATER ); rsrvr1Status = DG_RESERVOIR_BELOW_TARGET; rsrvr2Status = DG_RESERVOIR_BELOW_TARGET; state = DG_CHEM_DISINFECT_STATE_FILL_WITH_WATER_AND_DISINFECTANT; } } if ( TRUE == didTimeout( stateTimer, PRIME_ACID_LINE_TIMEOUT_MS ) ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; alarmDetectedPendingTrigger = ALARM_ID_DG_CHEM_DISINFECT_PRIME_ACID_LINE_TIME_OUT; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectFillWithWaterAndDisinfectantState function * handles the chemical disinfect fill with water state. The state fills * reservoir 1 until it overflows to reservoir 2. If the filling process * times out, it transitions to water cancellation state, otherwise, it * transitions to next state. The levels of the reservoirs are recorded to * be monitored during chemical disinfect. * @details Inputs: stateTimer, rsrvr1Status, rsrvr2Status, * rsrvrsVolMonitorTimer * @details Outputs: stateTimer, rsrvr1Status, rsrvr2Status, * R1ChemDisinfectVol, R2ChemDisinfectVol, rsrvrsVolMonitorTimer * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFillWithWaterAndDisinfectantState( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_FILL_WITH_WATER_AND_DISINFECTANT; // Get the flow rate that is used for mixing F32 measuredROFlowRate = getMeasuredROFlowRateLPM(); // If the flow is less than the minimum, request the concentrate pump to be on but do // control it. if ( measuredROFlowRate < MIN_RO_FLOW_FOR_CONC_PUMP_MIXING_LPM ) { requestConcentratePumpOn( CONCENTRATEPUMPS_CP2_BICARB ); } else { F32 acidCP2PumpFlowRate = ACID_TO_WATER_MIXING_RATIO * measuredROFlowRate * ML_PER_LITER; setConcentratePumpTargetSpeed( CONCENTRATEPUMPS_CP2_BICARB, acidCP2PumpFlowRate ); requestConcentratePumpOn( CONCENTRATEPUMPS_CP2_BICARB ); } // First reservoir 1 must be full if ( DG_RESERVOIR_BELOW_TARGET == rsrvr1Status ) { rsrvr1Status = getRsrvrFillStatus( DG_RESERVOIR_1, RSRVRS_FULL_VOL_ML, RSRVRS_FILL_UP_TIMEOUT_MS ); } // Once reservoir 1 is full, check the status of reservoir 2 since the water overflows to reservoir 2 else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr1Status ) { rsrvr2Status = getRsrvrFillStatus( DG_RESERVOIR_2, RSRVRS_PARTIAL_FILL_VOL_ML, RSRVRS_500ML_FILL_UP_TIMEOUT_MS ); // Once reservoir 2 is full, set the actuators for recirculation if ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { // Set the valves to drain R2 and no fill setValveState( VPI, VALVE_STATE_CLOSED ); setValveState( VBF, VALVE_STATE_OPEN ); setValveState( VPD, VALVE_STATE_DRAIN_C_TO_NO ); setValveState( VRD2, VALVE_STATE_OPEN ); setValveState( VDR, VALVE_STATE_RECIRC_C_TO_NC ); setValveState( VRC, VALVE_STATE_RECIRC_C_TO_NC ); // Done with mixing acid requestConcentratePumpOff( CONCENTRATEPUMPS_CP2_BICARB ); // Set the drain pump to control mode setDrainPumpTargetOutletPressure( CHEM_DISINFECT_TARGET_DRAIN_PRES_PSI ); setROPumpTargetFlowRateLPM( CHEM_DISINFECT_TARGET_RO_FLOW_LPM, CHEM_DISINFECT_MAX_RO_PRESSURE_PSI ); // Get the current volumes of R1 & R2. These values will be used to make sure the reservoirs' // volume does not change more than a certain amount during the actual chemical disinfect cycle R1ChemDisinfectVol = getLoadCellLargeFilteredWeight( LOAD_CELL_RESERVOIR_1_PRIMARY ); R2ChemDisinfectVol = getLoadCellLargeFilteredWeight( LOAD_CELL_RESERVOIR_2_PRIMARY ); stateTimer = getMSTimerCount(); rsrvrsVolMonitorTimer = getMSTimerCount(); state = DG_CHEM_DISINFECT_STATE_REMOVE_ACID_BOTTLE_FROM_UI; } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr1Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectRemoveAcidBottleFromUIState function * handles the chemical disinfect remove acid bottle from UI state. * The state fills sends a command to the UI to prompt the user to remove * the acid bottle and shut the acid and bicarb line. The state continues * waiting in this state until the user confirms that the bottle has been * removed and acid and bicarb lines are closed. * @details Inputs: TODO fill up * @details Outputs: chemDisinfectUIState TODO fill up * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectRemoveAcidBottleFromUIState( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_REMOVE_ACID_BOTTLE_FROM_UI; // Set the chemical disinfect that is published on the UI chemDisinfectUIState = CHEM_DISINFECT_UI_STATE_REMOVE_ACID; // TODO fill up. We should wait for the user until the acid bottle is removed and it is confirmed by the user setConcentratePumpTargetSpeed( CONCENTRATEPUMPS_CP1_ACID, -1.0F * CONC_PUMP_PRIME_SPEED_ML_PER_MIN ); state = DG_CHEM_DISINFECT_STATE_DISINFECT_R1_TO_R2; return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectDisinfectR1ToR2State function handles the * chemical disinfect R1 to R2 state. The state runs reservoir 1 to reservoir 2 * chemical disinfect. If the reservoirs leak or it cannot reach to temperature * within a certain period of time, it transitions to water cancellation. * If chemical disinfect reservoir 1 to reservoir 2 is completed, it * transitions to the next state. * @details Inputs: stateTimer, rsrvr1Status, rsrvr2Status * @details Outputs: stateTimer, rsrvr1Status, rsrvr2Status, * chemDisinfectUIState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectDisinfectR1ToR2State( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_DISINFECT_R1_TO_R2; CHEM_DISINFECT_STATUS_T status = getChemicalDisinfectStatus(); // Set the chemical disinfect that is published on the UI chemDisinfectUIState = CHEM_DISINFECT_UI_STATE_DISINFECT_DEVICE; switch ( status ) { case CHEM_DISINFECT_RSRVRS_LEAK_TIMEOUT: case CHEM_DISINFECT_HEAT_UP_TIMEOUT: state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; break; case CHEM_DISINFECT_COMPLETE: // Turn off the concentrate pumps requestConcentratePumpOff( CONCENTRATEPUMPS_CP1_ACID ); // Set the valves to transfer hot water from R1 to R2 and fill up R2. setValveState( VRO, VALVE_STATE_R2_C_TO_NC ); setValveState( VRD1, VALVE_STATE_OPEN ); setValveState( VRD2, VALVE_STATE_CLOSED ); setValveState( VRI, VALVE_STATE_R1_C_TO_NO ); setValveState( VRF, VALVE_STATE_R2_C_TO_NO ); // Although there is fluid in both reservoirs, but they are set to empty // to begin the transition of disinfectant water from R1 to R2. rsrvr2Status = DG_RESERVOIR_BELOW_TARGET; rsrvr1Status = DG_RESERVOIR_BELOW_TARGET; stateTimer = getMSTimerCount(); state = DG_CHEM_DISINFECT_STATE_FILL_R2_WITH_DISINFECTANT; break; default: // Do nothing, chemical disinfect is in progress break; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectFillR2WithDisinfectantState function * handles fill R2 with water state. The state transfers disinfectant from * reservoir 1 to reservoir 2 until disinfectant overflows from reservoir 2 * to reservoir 1. * If the fill times out, it transitions to water cancellation state, * otherwise, it transitions to the next state. * @details Inputs: rsrvr1Status, rsrvr2Status * @details Outputs: rsrvr1Status, rsrvr2Status, R1ChemDisinfectVol, * R2ChemDisinfectVol, prevChemDisinfectState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectFillR2WithDisinfectantState( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_FILL_R2_WITH_DISINFECTANT; // First reservoir 1 must be partially full if ( DG_RESERVOIR_BELOW_TARGET == rsrvr1Status ) { rsrvr1Status = getRsrvrFillStatus( DG_RESERVOIR_1, RSRVRS_PARTIAL_FILL_VOL_ML, RSRVRS_500ML_FILL_UP_TIMEOUT_MS ); } else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr1Status ) { rsrvr2Status = getRsrvrFillStatus( DG_RESERVOIR_2, RSRVRS_FULL_VOL_ML, RSRVRS_FILL_UP_TIMEOUT_MS ); if ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { // Get the current volumes to be monitored during R2 to R1 chemical disinfect state R1ChemDisinfectVol = getLoadCellLargeFilteredWeight( LOAD_CELL_RESERVOIR_1_PRIMARY ); R2ChemDisinfectVol = getLoadCellLargeFilteredWeight( LOAD_CELL_RESERVOIR_2_PRIMARY ); state = DG_CHEM_DISINFECT_STATE_DISINFECT_R2_TO_R1; } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr1Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectDisinfectR2ToR1State function handles the * chemical disinfect R2 to R1 state. If the reservoirs leak or it cannot * reach to temperature within a certain period of time, it transitions to * water cancellation state. If heat disinfect reservoir 1 to reservoir 2 is * completed, it transitions to the next state. * @details Inputs: stateTimer, rsrvr1Status * @details Outputs: stateTimer, rsrvr1Status * @return next state of the heat disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectDisinfectR2ToR1State( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_DISINFECT_R2_TO_R1; CHEM_DISINFECT_STATUS_T status = getChemicalDisinfectStatus(); switch ( status ) { case CHEM_DISINFECT_RSRVRS_LEAK_TIMEOUT: case CHEM_DISINFECT_HEAT_UP_TIMEOUT: state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; break; case CHEM_DISINFECT_COMPLETE: // Turn off the heaters stopHeater( DG_PRIMARY_HEATER ); stateTimer = getMSTimerCount(); state = DG_CHEM_DISINFECT_STATE_COOL_DOWN_HEATERS; // Set the disinfect flags setDisinfectStatus( TRUE ); setLastDisinfectDate( USAGE_INFO_CHEMICAL_DISINFECT, getRTCTimestamp() ); break; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectCoolDownHeatersState function handles the * chemical disinfect cool down heaters state. The state continues running * the fluid while the heaters are off for a certain period of time. * @details Inputs: stateTimer * @details Outputs: stateTimer * @return next state of the heat disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectCoolDownHeatersState( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_COOL_DOWN_HEATERS; if ( TRUE == didTimeout( stateTimer, POST_CHEM_DISINFECT_WAIT_TIME_MS ) ) { // Stop the drain pump and the RO pump to exit the closed loop signalDrainPumpHardStop(); signalROPumpHardStop(); if ( 0 == getDrainPumpTargetRPM() ) { // De-energize all the valves that are not in the path anymore // and wait for the RO membrane to be cooled down. setValveState( VPI, VALVE_STATE_CLOSED ); setValveState( VBF, VALVE_STATE_CLOSED ); setValveState( VDR, VALVE_STATE_DRAIN_C_TO_NO ); setValveState( VRC, VALVE_STATE_DRAIN_C_TO_NO ); setValveState( VPD, VALVE_STATE_DRAIN_C_TO_NO ); setValveState( VRD1, VALVE_STATE_OPEN ); rsrvr1Status = DG_RESERVOIR_ABOVE_TARGET; setDrainPumpTargetRPM( DRAIN_PUMP_TARGET_RPM ); stateTimer = getMSTimerCount(); state = DG_CHEM_DISINFECT_STATE_DISINFECTANT_DRAIN_R1; } } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectDisinfectantDrainR1State function handles * the chemical disinfect disinfectant drain R1 state. The state drains * reservoir 1 and if it times out, it transitions to basic cancellation * state. Otherwise, it transitions to the next state. * @details Inputs: rsrvr1Status, rsrvr2Status * @details Outputs: stateTimer, rsrvr1Status, rsrvr2Status, * prevChemDisinfectState, chemDisinfectUIState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectDisinfectantDrainR1State( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_DISINFECTANT_DRAIN_R1; // Set the chemical disinfect that is published on the UI chemDisinfectUIState = CHEM_DISINFECT_UI_STATE_FLUSH_AFTER_DISINFECT; if ( DG_RESERVOIR_ABOVE_TARGET == rsrvr1Status ) { rsrvr1Status = getRsrvrDrainStatus( DG_RESERVOIR_1, DRAIN_WEIGHT_UNCHANGE_TIMEOUT, RSRVRS_INITIAL_DRAIN_TIME_OUT_MS ); } else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr1Status ) { // Done with draining reservoir 1 setValveState( VRD1, VALVE_STATE_CLOSED ); // Set the drain valve to reservoir 2 setValveState( VRD2, VALVE_STATE_OPEN ); rsrvr2Status = DG_RESERVOIR_ABOVE_TARGET; stateTimer = getMSTimerCount(); state = DG_CHEM_DISINFECT_STATE_DISINFECTANT_DRAIN_R2; } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr1Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectDisinfectantDrainR1State function handles * the chemical disinfect disinfectant drain R2 state. The state drains * reservoir 1 and if it times out, it transitions to basic cancellation * state. Otherwise, it transitions to the next state. * @details Inputs: rsrvr1Status, rsrvr2Status * @details Outputs: stateTimer, rsrvr1Status, rsrvr2Status, * prevChemDisinfectState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectDisinfectantDrainR2State( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_DISINFECTANT_DRAIN_R2; if ( DG_RESERVOIR_ABOVE_TARGET == rsrvr2Status ) { rsrvr2Status = getRsrvrDrainStatus( DG_RESERVOIR_2, DRAIN_WEIGHT_UNCHANGE_TIMEOUT, RSRVRS_INITIAL_DRAIN_TIME_OUT_MS ); } else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { // Done with draining the reservoirs signalDrainPumpHardStop(); // Set the valves to fill up R1 and overflow to R2 setValveState( VPI, VALVE_STATE_OPEN ); setValveState( VPD, VALVE_STATE_OPEN_C_TO_NC ); // Done with draining reservoir 2 setValveState( VRD2, VALVE_STATE_CLOSED ); setValveState( VPO, VALVE_STATE_FILL_C_TO_NC ); setValveState( VRF, VALVE_STATE_R1_C_TO_NC ); setValveState( VRO, VALVE_STATE_R1_C_TO_NO ); setValveState( VRI, VALVE_STATE_R2_C_TO_NC ); setROPumpTargetFlowRateLPM( RO_PUMP_TARGET_FLUSH_FILL_FLOW_RATE_LPM, MAX_RO_PUMP_FLUSH_FILL_PRESSURE_PSI ); rsrvr1Status = DG_RESERVOIR_BELOW_TARGET; rsrvr2Status = DG_RESERVOIR_BELOW_TARGET; stateTimer = getMSTimerCount(); state = DG_CHEM_DISINFECT_STATE_RINSE_R1_TO_R2; } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectRinseR1ToR2State function handles the chemical * disinfect rinse R1 to R2 state. The state rinses reservoir 1 to reservoir * 2. If the rinse process times out, it transitions to water cancellation * state, otherwise, it transitions to the next state. * @details Inputs: rsrvr1Status, rsrvr2Status * @details Outputs: stateTimer, rsrvr1Status, rsrvr2Status, * prevChemDisinfectState, alarmDetectedPendingTrigger * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectRinseR1ToR2State( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_RINSE_R1_TO_R2; if ( DG_RESERVOIR_BELOW_TARGET == rsrvr1Status ) { rsrvr1Status = getRsrvrFillStatus( DG_RESERVOIR_1, RSRVRS_FULL_VOL_ML, RSRVRS_FILL_UP_TIMEOUT_MS ); // Keep monitoring the status of reservoir 2 at the same time rsrvr2Status = getRsrvrFillStatus( DG_RESERVOIR_2, RSRVRS_PARTIAL_FILL_VOL_ML, RSRVRS_500ML_FILL_UP_TIMEOUT_MS ); // Reservoir 2 cannot be filled before reservoir 1 is filled and is overflowing to reservoir 2. If reservoir 2 has already // reached to target volume, it means reservoir 1's load cell might be reading incorrect values. This situation might continue // until reservoir 2 is filled up and the tubing might expand or leak. if ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; alarmDetectedPendingTrigger = ALARM_ID_DG_INVALID_LOAD_CELL_VALUE; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } } else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr1Status ) { rsrvr2Status = getRsrvrFillStatus( DG_RESERVOIR_2, RSRVRS_PARTIAL_FILL_VOL_ML, RSRVRS_500ML_FILL_UP_TIMEOUT_MS ); if ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { // Set the valves to rinse R2 to R1 and drain R1 setValveState( VRF, VALVE_STATE_R2_C_TO_NO ); setValveState( VRO, VALVE_STATE_R2_C_TO_NC ); setValveState( VRD1, VALVE_STATE_OPEN ); setValveState( VRI, VALVE_STATE_R1_C_TO_NO ); setDrainPumpTargetRPM( DRAIN_PUMP_TARGET_RPM ); rsrvr1Status = DG_RESERVOIR_ABOVE_TARGET; rsrvr2Status = DG_RESERVOIR_BELOW_TARGET; stateTimer = getMSTimerCount(); state = DG_CHEM_DISINFECT_STATE_RINSE_R2_TO_R1_AND_DRAIN_R1; } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr1Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectRinseR2ToR1AndDrainR1State function handles * the chemical disinfect rinse R2 to R1 and drain R1 state. The state * rinses reservoir 2 and drains reservoir 1 at the same time. If the drain * process times out, it transitions to basic cancellation state, and * if the rinse times out, it transitions to water cancellation state. * If the drain and rinse are completed within the define time, it * transitions to the next state. * @details Inputs: rsrvr1Status, rsrvr2Status * @details Outputs: stateTimer, rsrvr1Status, rsrvr2Status, * prevChemDisinfectState, alarmDetectedPendingTrigger * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectRinseR2ToR1AndDrainR1State( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_RINSE_R2_TO_R1_AND_DRAIN_R1; if ( DG_RESERVOIR_ABOVE_TARGET == rsrvr1Status ) { rsrvr1Status = getRsrvrDrainStatus( DG_RESERVOIR_1, DRAIN_WEIGHT_UNCHANGE_TIMEOUT, RSRVRS_INITIAL_DRAIN_TIME_OUT_MS ); } else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr1Status ) { // Done with draining R1 signalDrainPumpHardStop(); setValveState( VRD1, VALVE_STATE_CLOSED ); } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr1Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } // First reservoir 2 must be completely full if ( DG_RESERVOIR_BELOW_TARGET == rsrvr2Status ) { rsrvr2Status = getRsrvrFillStatus( DG_RESERVOIR_2, RSRVRS_FULL_VOL_ML, RSRVRS_FILL_UP_TIMEOUT_MS ); U32 drainPumpRPM = getDrainPumpTargetRPM(); // Keep monitoring the status of reservoir 1 as the same time F32 volume = getLoadCellSmallFilteredWeight( LOAD_CELL_RESERVOIR_1_PRIMARY ); // Reservoir 1 cannot be filled before reservoir 2 is filled and is overflowing to reservoir 1. If reservoir 1 has already // reached to target volume, it means reservoir 2's load cell might be reading incorrect values. This situation might continue // until reservoir 1 is filled up and the tubing might expand or leak. // Before checking whether reservoir 1 is filled pre-maturely, we have to make sure reservoir 1 is drained completely to make // sure the extra volume that is read is not because of previous water that is being drained currently and it is above 500 mL if ( ( volume >= RSRVRS_PARTIAL_FILL_VOL_ML ) && ( 0 == drainPumpRPM ) ) { prevChemDisinfectState = state; alarmDetectedPendingTrigger = ALARM_ID_DG_INVALID_LOAD_CELL_VALUE; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } } // Once reservoir 2 is completely full, monitor reservoir 1 else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { rsrvr1Status = getRsrvrFillStatus( DG_RESERVOIR_1, RSRVRS_PARTIAL_FILL_VOL_ML, RSRVRS_500ML_FILL_UP_TIMEOUT_MS ); if ( DG_RESERVOIR_REACHED_TARGET == rsrvr1Status ) { // Set the valves to rinse R2 to R1 and drain R1 setValveState( VRD2, VALVE_STATE_OPEN ); setValveState( VRO, VALVE_STATE_R1_C_TO_NO ); setValveState( VRI, VALVE_STATE_R2_C_TO_NC ); setValveState( VRF, VALVE_STATE_R1_C_TO_NC ); // Turn on the drain pump to drain R2 setDrainPumpTargetRPM( DRAIN_PUMP_TARGET_RPM ); // Set the reservoir status rsrvr1Status = DG_RESERVOIR_BELOW_TARGET; rsrvr2Status = DG_RESERVOIR_ABOVE_TARGET; state = DG_CHEM_DISINFECT_STATE_RINSE_R1_TO_R2_AND_DRAIN_R2; stateTimer = getMSTimerCount(); } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr1Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectRinseR1ToR2AndDrainR2State function handles * the chemical disinfect rinse R1 to R2 and drain R2 state. The state * rinses reservoir 1 and drains reservoir 2 at the same time. If the drain * process times out, it transitions to basic cancellation state, and * if the rinse times out, it transitions to water cancellation state. * If the drain and rinse are completed within the define time, it * transitions to the next state. * @details Inputs: rsrvr1Status, rsrvr2Status, numberOfPostDisinfectRinses * @details Outputs: stateTimer, rsrvr1Status, rsrvr2Status, * prevChemDisinfectState, alarmDetectedPendingTrigger, isThisLastDrain * numberOfPostDisinfectRinses * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectRinseR1ToR2AndDrainR2State( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_RINSE_R1_TO_R2_AND_DRAIN_R2; if ( DG_RESERVOIR_ABOVE_TARGET == rsrvr2Status ) { rsrvr2Status = getRsrvrDrainStatus( DG_RESERVOIR_2, DRAIN_WEIGHT_UNCHANGE_TIMEOUT, RSRVRS_INITIAL_DRAIN_TIME_OUT_MS ); } else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { // Done with draining R2 signalDrainPumpHardStop(); setValveState( VRD2, VALVE_STATE_CLOSED ); } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } // First reservoir 1 must be completely full if ( DG_RESERVOIR_BELOW_TARGET == rsrvr1Status ) { rsrvr1Status = getRsrvrFillStatus( DG_RESERVOIR_1, RSRVRS_FULL_VOL_ML, RSRVRS_FILL_UP_TIMEOUT_MS ); U32 drainPumpRPM = getDrainPumpTargetRPM(); // Keep monitoring the status of reservoir 2 as the same time F32 volume = getLoadCellSmallFilteredWeight( LOAD_CELL_RESERVOIR_2_PRIMARY ); // Reservoir 1 cannot be filled before reservoir 2 is filled and is overflowing to reservoir 1. If reservoir 1 has already // reached to target volume, it means reservoir 2's load cell might be reading incorrect values. This situation might continue // until reservoir 1 is filled up and the tubing might expand or leak. // Before checking whether reservoir 1 is filled pre-maturely, we have to make sure reservoir 1 is drained completely to make // sure the extra volume that is read is not because of previous water that is being drained currently and it is above 500 mL if ( ( volume >= RSRVRS_PARTIAL_FILL_VOL_ML ) && ( 0 == drainPumpRPM ) ) { prevChemDisinfectState = state; alarmDetectedPendingTrigger = ALARM_ID_DG_INVALID_LOAD_CELL_VALUE; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } } // Once reservoir 1 is completely full, monitor reservoir 2 else if ( DG_RESERVOIR_REACHED_TARGET == rsrvr1Status ) { rsrvr2Status = getRsrvrFillStatus( DG_RESERVOIR_2, RSRVRS_PARTIAL_FILL_VOL_ML, RSRVRS_500ML_FILL_UP_TIMEOUT_MS ); if ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { // If the number of post chemical disinfect rinses have finished, // transition to drain R1 state. Otherwise, start the next rinse. if ( ++numberOfPostDisinfectRinses >= NUM_OF_POST_DISINFECT_RINSES ) { // Done with filling, turn off the RO pump signalROPumpHardStop(); // Set the rest of the valve to be in the de-enrgize mode setValveState( VPO, VALVE_STATE_NOFILL_C_TO_NO ); setValveState( VRF, VALVE_STATE_R2_C_TO_NO ); setValveState( VRI, VALVE_STATE_R1_C_TO_NO ); setValveState( VRO, VALVE_STATE_R1_C_TO_NO ); setValveState( VRD2, VALVE_STATE_OPEN ); // Turn on the drain pump to drain R2 setDrainPumpTargetRPM( DRAIN_PUMP_TARGET_RPM ); // Set the reservoir status rsrvr2Status = DG_RESERVOIR_ABOVE_TARGET; // This is last drain isThisLastDrain = TRUE; state = DG_CHEM_DISINFECT_STATE_DRAIN_R2; } else { // Set the reservoirs' status setValveState( VRF, VALVE_STATE_R2_C_TO_NO ); setValveState( VRO, VALVE_STATE_R2_C_TO_NC ); setValveState( VRD1, VALVE_STATE_OPEN ); setValveState( VRI, VALVE_STATE_R1_C_TO_NO ); setDrainPumpTargetRPM( DRAIN_PUMP_TARGET_RPM ); rsrvr1Status = DG_RESERVOIR_ABOVE_TARGET; rsrvr2Status = DG_RESERVOIR_BELOW_TARGET; state = DG_CHEM_DISINFECT_STATE_RINSE_R2_TO_R1_AND_DRAIN_R1; } stateTimer = getMSTimerCount(); } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } } else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr1Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectRinseCirculationState function handles the * chemical disinfect rinse RO circulation and concentrate pumps state. * Once the defined flush circulation time has elapsed, it transitions to * the next state. * @details Inputs: stateTimer * @details Outputs: none * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectRinseCirculationState( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_RINSE_CIRCULATION; if ( TRUE == didTimeout( stateTimer, FLUSH_CICRCULATION_WAIT_TIME_MS ) ) { state = DG_CHEM_DISINFECT_STATE_COMPLETE; } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectCancelModeBasicPathState function handles the * chemical disinfect cancel mode basic path state. The state sets the state * to complete and raises an alarm. * @details Inputs: none * @details Outputs: cancellationMode, chemDisinfectUIState * @return next state of the heat disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectCancelModeBasicPathState( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; // Set the chemical disinfect that is published on the UI chemDisinfectUIState = CHEM_DISINFECT_UI_STATE_CANCEL_DISINFECT; // Set the cancellation mode cancellationMode = CANCELLATION_MODE_BASIC; failChemicalDisinfect(); return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectCancelModeWaterPathState function handles the * chemical disinfect cancel mode cold water path state. * @details Inputs: rsrvr1Status, rsrvr2Status, cancellationMode, stateTimer * @details Outputs: rsrvr1Status, rsrvr2Status, cancellationMode, stateTimer, * chemDisinfectUIState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectCancelModeWaterPathState( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; // Set the chemical disinfect that is published on the UI chemDisinfectUIState = CHEM_DISINFECT_UI_STATE_CANCEL_DISINFECT; if ( CANCELLATION_MODE_NONE == cancellationMode ) { // Stop all the actuators first then decide who should run next deenergizeActuators(); cancellationMode = CANCELLATION_MODE_WATER; rsrvr1Status = DG_RESERVOIR_ABOVE_TARGET; rsrvr2Status = DG_RESERVOIR_ABOVE_TARGET; // The drain is set to start from reservoir 2 setValveState( VRD2, VALVE_STATE_OPEN ); setDrainPumpTargetRPM( DRAIN_PUMP_TARGET_RPM ); // Start the timer for drain timeout stateTimer = getMSTimerCount(); } // If reservoir 2 is empty, set to drain reservoir 1 if ( DG_RESERVOIR_ABOVE_TARGET == rsrvr2Status ) { // If the cancellation water path cannot be done, got to basic cancellation path rsrvr2Status = getRsrvrDrainStatus( DG_RESERVOIR_2, DRAIN_WEIGHT_UNCHANGE_TIMEOUT, RSRVRS_INITIAL_DRAIN_TIME_OUT_MS ); if ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) { // Set the drain valve to reservoir 1 setValveState( VRD1, VALVE_STATE_OPEN ); setValveState( VRD2, VALVE_STATE_CLOSED ); } } // Could not drain reservoir 2. Transition to basic cancellation path else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr2Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } // If reservoir 2 has already been drained and reservoir 1 is empty, reset and switch to complete if ( ( DG_RESERVOIR_REACHED_TARGET == rsrvr2Status ) && ( DG_RESERVOIR_ABOVE_TARGET == rsrvr1Status ) ) { // If the cancellation water path cannot be done, got to basic cancellation path rsrvr1Status = getRsrvrDrainStatus( DG_RESERVOIR_1, DRAIN_WEIGHT_UNCHANGE_TIMEOUT, RSRVRS_INITIAL_DRAIN_TIME_OUT_MS ); if ( DG_RESERVOIR_REACHED_TARGET == rsrvr1Status ) { failChemicalDisinfect(); } // Could not drain reservoir 1. Transition to basic cancellation path else if ( DG_RESERVOIR_NOT_REACHED_TARGET == rsrvr1Status ) { prevChemDisinfectState = state; state = DG_CHEM_DISINFECT_STATE_CANCEL_BASIC_PATH; } } return state; } /*********************************************************************//** * @brief * The handleChemicalDisinfectCompleteState function handles the chemical * disinfect complete state. The state stops chemical disinfect and * requests transition to mode standby. * @details Inputs: none * @details Outputs: chemDisinfectUIState * @return next state of the chemical disinfect state machine *************************************************************************/ static DG_CHEM_DISINFECT_STATE_T handleChemicalDisinfectCompleteState( void ) { DG_CHEM_DISINFECT_STATE_T state = DG_CHEM_DISINFECT_STATE_COMPLETE; // Set the chemical disinfect that is published on the UI chemDisinfectUIState = CHEM_DISINFECT_UI_STATE_COMPLETE; stopChemicalDisinfect(); return state; } /*********************************************************************//** * @brief * The failChemicalDisinfect function sets the alarm that failed the * chemical disinfect mode. * @details Inputs: alarmDetectedPendingTrigger, prevChemDisinfectState * @details Outputs: none * @return none *************************************************************************/ static void failChemicalDisinfect( void ) { SET_ALARM_WITH_1_U32_DATA( alarmDetectedPendingTrigger, prevChemDisinfectState ) } /*********************************************************************//** * @brief * The getRsrvrFillStatus function checks whether the target reservoir * is full or not. If the fill times out, it sets the state machine to * complete and exits the chemical disinfect mode. * @details Inputs: rsrvrFillStableTimeCounter, alarm, stateTimer * @details Outputs: none * @param r is DG_RESERVOIR_1 or DG_RESERVOIR_2 * @param targetVol is the target fill volume * @param timeout is the fill up timeout * @return the status of the reservoirs during filling *************************************************************************/ static DG_RESERVOIR_STATUS_T getRsrvrFillStatus( DG_RESERVOIR_ID_T r, F32 targetVol, U32 timeout ) { DG_RESERVOIR_STATUS_T status = DG_RESERVOIR_BELOW_TARGET; F32 volume = 0.0; if ( DG_RESERVOIR_1 == r ) { volume = getLoadCellSmallFilteredWeight( LOAD_CELL_RESERVOIR_1_PRIMARY ); } else if ( DG_RESERVOIR_2 == r ) { volume = getLoadCellSmallFilteredWeight( LOAD_CELL_RESERVOIR_2_PRIMARY ); } else { SET_ALARM_WITH_2_U32_DATA( ALARM_ID_DG_SOFTWARE_FAULT, SW_FAULT_ID_INVALID_DG_RESERVOIR_SELECTED, r ) } // Check the volume of the reservoir against the target volume if ( volume >= targetVol ) { if ( ++rsrvrFillStableTimeCounter >= RSRVRS_FULL_STABLE_TIME_COUNT ) { status = DG_RESERVOIR_REACHED_TARGET; rsrvrFillStableTimeCounter = 0; // Set the state timer in case it needs to be used for another timeout check stateTimer = getMSTimerCount(); } } else if ( TRUE == didTimeout( stateTimer, timeout ) ) { // Failed to fill ontime. Update the previous chemical disinfect state and transition to basic cancellation prevChemDisinfectState = chemDisinfectState; alarmDetectedPendingTrigger = ALARM_ID_DG_RESERVOIR_FILL_TIMEOUT; status = DG_RESERVOIR_NOT_REACHED_TARGET; } return status; } /*********************************************************************//** * @brief * The getRsrvrDrainStatus function returns the status of draining a * reservoir. * @details Inputs: stateTimer, prevChemDisinfectState, chemDisinfectState, * alarm * @details Outputs: stateTimer, chemDisinfectState, alarm * @param r is DG_RESERVOIR_1 or DG_RESERVOIR_2 * @param drainSteadyStateTimeout which is the time the reservoir's level * does not change and is steady state * @param timeout which is the timeout that a reservoir must be drained by * then * @return the status of the reservoirs during draining *************************************************************************/ static DG_RESERVOIR_STATUS_T getRsrvrDrainStatus( DG_RESERVOIR_ID_T r, U32 drainSteadyStateTimeout, U32 timeout ) { DG_RESERVOIR_STATUS_T status = DG_RESERVOIR_ABOVE_TARGET; // If the drain parameters of the reservoir is not initialized, initialize them if ( FALSE == haveDrainParamsBeenInit[ r ] ) { initDrainParameters( r ); haveDrainParamsBeenInit[ r ] = TRUE; } BOOL isDrainComplete = hasTargetDrainVolumeBeenReached( r, drainSteadyStateTimeout ); if ( TRUE == isDrainComplete ) { // Set the state timer in case it needs to be used for another timeout check stateTimer = getMSTimerCount(); haveDrainParamsBeenInit[ r ] = FALSE; status = DG_RESERVOIR_REACHED_TARGET; } else if ( TRUE == didTimeout( stateTimer, timeout ) ) { // Failed to drain on time. Update the previous chemical disinfect state and transition to basic cancellation prevChemDisinfectState = chemDisinfectState; haveDrainParamsBeenInit[ r ] = FALSE; alarmDetectedPendingTrigger = ALARM_ID_DG_RESERVOIR_DRAIN_TIMEOUT; status = DG_RESERVOIR_NOT_REACHED_TARGET; } return status; } /*********************************************************************//** * @brief * The getChemicalDisinfectStatus function monitors and returns the current * stage of chemical disinfect cycle. If the level of the reservoirs is drifted * consecutively for the define period of time, it sets the reservoir leak * time out alarm. If the chemical disinfect has started or has elapsed, it * set the status of chemical disinfect accordingly. * @details Inputs: areRsrvrsLeaking, areRsrvrsLeaking * @details Outputs: areRsrvrsLeaking, areRsrvrsLeaking * @return status of the chemical disinfect (i.e in progress, complete) *************************************************************************/ static CHEM_DISINFECT_STATUS_T getChemicalDisinfectStatus( void ) { CHEM_DISINFECT_STATUS_T status = CHEM_DISINFECT_IN_PROGRESS; // Update the variables F32 ThdTemp = getTemperatureValue( TEMPSENSORS_HEAT_DISINFECT ); BOOL isR1OutOfRange = fabs( getLoadCellSmallFilteredWeight( LOAD_CELL_RESERVOIR_1_PRIMARY ) - R1ChemDisinfectVol ) > RSRVRS_MAX_TARGET_VOL_CHANGE_ML; BOOL isR2OutOfRange = fabs( getLoadCellSmallFilteredWeight( LOAD_CELL_RESERVOIR_2_PRIMARY ) - R2ChemDisinfectVol ) > RSRVRS_MAX_TARGET_VOL_CHANGE_ML; // Check if either reservoir 1 or reservoir 2 are losing volume more than allowed volume if ( ( TRUE == isR1OutOfRange ) || ( TRUE == isR2OutOfRange ) ) { // If the leak is the first time after a while, set the flag and start the timer if ( FALSE == areRsrvrsLeaking ) { areRsrvrsLeaking = TRUE; rsrvrsVolMonitorTimer = getMSTimerCount(); } // If the volume is out of range and it has timed out, exit else if ( TRUE == didTimeout( rsrvrsVolMonitorTimer, RSRVRS_TARGET_VOL_OUT_TIMEOUT_MS ) ) { areRsrvrsLeaking = FALSE; alarmDetectedPendingTrigger = ALARM_ID_DG_RESERVOIR_LEAK_TIMEOUT; status = CHEM_DISINFECT_RSRVRS_LEAK_TIMEOUT; } } // Reservoirs are in range else { areRsrvrsLeaking = FALSE; } // If the coldest spot which is THd is less than minimum chemical disinfect temperature, // reset the chemical disinfect timers and check whether heating up has timed out if ( ThdTemp < CHEM_DISINFECT_TARGET_TEMPERATURE_C ) { // Keep reseting the disinfect timer so the elapsed time is always 0 until disinfect truly starts chemDisinfectTimer = getMSTimerCount(); isPartialDisinfectInProgress = FALSE; if ( TRUE == didTimeout( stateTimer, CHEM_DISINFECT_START_TEMP_TIMOUT_MS ) ) { // Heating up to minimum temperature for chemical disinfect failed alarmDetectedPendingTrigger = ALARM_ID_DG_CHEM_DISINFECT_TARGET_TEMP_TIMEOUT; status = CHEM_DISINFECT_HEAT_UP_TIMEOUT; } } else if ( ( isPartialDisinfectInProgress != TRUE ) && ( ThdTemp > CHEM_DISINFECT_TARGET_TEMPERATURE_C ) ) { // The temperature of the coldest spot is in range to start the disinfect timer chemDisinfectTimer = getMSTimerCount(); isPartialDisinfectInProgress = TRUE; } // If chemical disinfect temperature has been reached, check if this stage of chemical disinfect is done if ( ( TRUE == isPartialDisinfectInProgress ) && ( TRUE == didTimeout( chemDisinfectTimer, CHEM_DISINFECT_TIME_MS ) ) ) { // Done with this stage of chemical disnfect. Reset the variables status = CHEM_DISINFECT_COMPLETE; isPartialDisinfectInProgress = FALSE; } return status; } /*********************************************************************//** * @brief * The publishChemicalDisinfectData function publishes chemical disinfect * data at the set interval. * @details Inputs: dataPublishCounter * @details Outputs: dataPublishCounter * @return: none *************************************************************************/ static void publishChemicalDisinfectData( void ) { if ( ++dataPublishCounter >= CHEM_DISINFECT_DATA_PUB_INTERVAL ) { MODE_CHEMICAL_DISINFECT_DATA_T data; MODE_CHEMICAL_DISINFECT_UI_DATA_T uiData; data.chemDisinfectState = (U32)chemDisinfectState; data.overallElapsedTime = calcTimeSince( overallChemDisinfectTimer ); data.stateElapsedTime = calcTimeSince( stateTimer ); data.cancellationMode = (U32)cancellationMode; // If the mode is in the actual chemical disinfect states, publish the elapsed time, otherwise publish 0 to avoid confusion if ( ( DG_CHEM_DISINFECT_STATE_DISINFECT_R1_TO_R2 == chemDisinfectState ) || ( DG_CHEM_DISINFECT_STATE_DISINFECT_R2_TO_R1 == chemDisinfectState ) ) { uiData.chemDisinfectTargetTime = CHEM_DISINFECT_TIME_MS; uiData.chemDisinfectCountdownTime = CHEM_DISINFECT_TIME_MS - calcTimeSince( chemDisinfectTimer ); data.R1FillLevel = R1ChemDisinfectVol; data.R2FillLevel = R2ChemDisinfectVol; } else { uiData.chemDisinfectCountdownTime = 0.0; data.R1FillLevel = 0.0; data.R2FillLevel = 0.0; } data.postDisinfectTargetRinseCount = NUM_OF_POST_DISINFECT_RINSES; data.postDisinfectCurrentRinseCount = numberOfPostDisinfectRinses; data.chemDisinfectUIState = chemDisinfectUIState; // General data publish channel broadcastData( MSG_ID_DG_CHEM_DISINFECT_DATA, COMM_BUFFER_OUT_CAN_DG_BROADCAST, (U08*)&data, sizeof( MODE_CHEMICAL_DISINFECT_DATA_T ) ); // Publish data to UI broadcastData( MSG_ID_DG_CHEM_DISINFECT_TIME_DATA, COMM_BUFFER_OUT_CAN_DG_2_UI, (U08*)&uiData, sizeof( MODE_CHEMICAL_DISINFECT_UI_DATA_T ) ); dataPublishCounter = 0; } } /*********************************************************************//** * @brief * The monitorModeChemicalDisinfect function monitors the status of the caps and * sets the state of the state machine to water cancellation path if the caps * are not closed during the run. * @details Inputs: chemDisinfectState * @details Outputs: prevChemDisinfectState, chemDisinfectState, * alarmDetectedPendingTrigger * @return: none *************************************************************************/ static void monitorModeChemicalDisinfect( void ) { BOOL isAlarmNeeded = FALSE; switch( chemDisinfectState ) { case DG_CHEM_DISINFECT_STATE_START: case DG_CHEM_DISINFECT_STATE_DRAIN_R1: case DG_CHEM_DISINFECT_STATE_DRAIN_R2: case DG_CHEM_DISINFECT_STATE_FLUSH_DRAIN: case DG_CHEM_DISINFECT_STATE_FLUSH_CIRCULATION: case DG_CHEM_DISINFECT_STATE_FLUSH_R1_AND_R2: case DG_CHEM_DISINFECT_STATE_FLUSH_R2_AND_DRAIN_R1: case DG_CHEM_DISINFECT_STATE_FLUSH_DRAIN_R2: case DG_CHEM_DISINFECT_STATE_FLUSH_DRAIN_R1: if ( ( STATE_OPEN == getSwitchStatus( CONCENTRATE_CAP ) ) || ( STATE_OPEN == getSwitchStatus( DIALYSATE_CAP ) ) ) { isAlarmNeeded = TRUE; } break; case DG_CHEM_DISINFECT_STATE_PRIME_ACID_LINE: case DG_CHEM_DISINFECT_STATE_FILL_WITH_WATER_AND_DISINFECTANT: if ( ( STATE_CLOSED == getSwitchStatus( CONCENTRATE_CAP ) ) || ( STATE_OPEN == getSwitchStatus( DIALYSATE_CAP ) ) ) { isAlarmNeeded = TRUE; } break; case DG_CHEM_DISINFECT_STATE_DISINFECT_R1_TO_R2: case DG_CHEM_DISINFECT_STATE_FILL_R2_WITH_DISINFECTANT: case DG_CHEM_DISINFECT_STATE_DISINFECT_R2_TO_R1: case DG_CHEM_DISINFECT_STATE_DISINFECTANT_DRAIN_R1: case DG_CHEM_DISINFECT_STATE_DISINFECTANT_DRAIN_R2: case DG_CHEM_DISINFECT_STATE_RINSE_R1_TO_R2: case DG_CHEM_DISINFECT_STATE_RINSE_R2_TO_R1_AND_DRAIN_R1: case DG_CHEM_DISINFECT_STATE_RINSE_R1_TO_R2_AND_DRAIN_R2: case DG_CHEM_DISINFECT_STATE_RINSE_CIRCULATION: case DG_CHEM_DISINFECT_STATE_COMPLETE: if ( ( STATE_OPEN == getSwitchStatus( CONCENTRATE_CAP ) ) || ( STATE_OPEN == getSwitchStatus( DIALYSATE_CAP ) ) ) { isAlarmNeeded = TRUE; } break; } #ifndef _RELEASE_ if ( getSoftwareConfigStatus( SW_CONFIG_DISABLE_CAPS_MONITOR ) != SW_CONFIG_ENABLE_VALUE ) #endif { if ( TRUE == isAlarmNeeded ) { // Set the variables to fail and go to cancel water path. Set the pending alarm to no alarm so the cancel water path // will not be raising the alarm at end of the cancel water path. The recoverable alarm is raised here in this function U32 ConcCap = (U32)getSwitchStatus( CONCENTRATE_CAP ); U32 DialysateCap = (U32)getSwitchStatus( DIALYSATE_CAP ); prevChemDisinfectState = chemDisinfectState; chemDisinfectState = DG_CHEM_DISINFECT_STATE_CANCEL_WATER_PATH; alarmDetectedPendingTrigger = ALARM_ID_DG_DIALYSATE_OR_CONC_CAP_NOT_IN_PROPER_POSITION; } } } /**@}*/