Index: firmware/App/Modes/ModeTreatmentParams.c
===================================================================
diff -u -r0a4dcd288d4347b85baaa0b07da568b6add5eac7 -r75e1ae332d1446dddf9b8d4ce6e8317449c57d67
--- firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision 0a4dcd288d4347b85baaa0b07da568b6add5eac7)
+++ firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision 75e1ae332d1446dddf9b8d4ce6e8317449c57d67)
@@ -7,8 +7,8 @@
 *
 * @file    ModeTreatmentParams.c
 *
-* @author  (last)      Sean Nash
-* @date    (last)      01-Aug-2022
+* @author  (last)      Michael Garthwaite
+* @date    (last)      19-Jan-2023
 *
 * @author  (original)  Sean Nash
 * @date    (original)  29-May-2020
@@ -67,11 +67,11 @@
     { CRITICAL_DATA_TYPE_U32, {.uInt=50},   {.uInt=150},  {.uInt=75}   }, // TREATMENT_PARAM_RINSEBACK_FLOW_RATE
     { CRITICAL_DATA_TYPE_S32, {.sInt=-300}, {.sInt=70},   {.sInt=-300} }, // TREATMENT_PARAM_ART_PRESSURE_LOW_LIMIT
     { CRITICAL_DATA_TYPE_S32, {.sInt=-270}, {.sInt=100},  {.sInt=100}  }, // TREATMENT_PARAM_ART_PRESSURE_HIGH_LIMIT
-    { CRITICAL_DATA_TYPE_S32, {.sInt=20},   {.sInt=570},  {.sInt=20}   }, // TREATMENT_PARAM_VEN_PRESSURE_LOW_LIMIT
-    { CRITICAL_DATA_TYPE_S32, {.sInt=50},   {.sInt=600},  {.sInt=400}  }, // TREATMENT_PARAM_VEN_PRESSURE_HIGH_LIMIT
+    { CRITICAL_DATA_TYPE_S32, {.sInt=20},   {.sInt=370},  {.sInt=20}   }, // TREATMENT_PARAM_VEN_PRESSURE_LOW_LIMIT
+    { CRITICAL_DATA_TYPE_S32, {.sInt=50},   {.sInt=400},  {.sInt=400}  }, // TREATMENT_PARAM_VEN_PRESSURE_HIGH_LIMIT
     { CRITICAL_DATA_TYPE_F32, {.sFlt=0.0},  {.sFlt=1.0},  {.sFlt=0.0}  }, // TREATMENT_PARAM_HEPARIN_DISPENSE_RATE
     { CRITICAL_DATA_TYPE_F32, {.sFlt=0.0},  {.sFlt=2.0},  {.sFlt=0.0}  }, // TREATMENT_PARAM_HEPARIN_BOLUS_VOLUME
-    { CRITICAL_DATA_TYPE_F32, {.sFlt=35.0}, {.sFlt=38.0}, {.sFlt=37.0} }, // TREATMENT_PARAM_DIALYSATE_TEMPERATURE
+    { CRITICAL_DATA_TYPE_F32, {.sFlt=35.0}, {.sFlt=37.0}, {.sFlt=37.0} }, // TREATMENT_PARAM_DIALYSATE_TEMPERATURE
     { CRITICAL_DATA_TYPE_F32, {.sFlt=0.0},  {.sFlt=8.0},  {.sFlt=0.0}  }, // TREATMENT_PARAM_UF_VOLUME
 };
 
@@ -106,7 +106,7 @@
  *************************************************************************/
 void initTreatParamsMode( void )
 {
-    currentTreatmentParamsState = HD_TREATMENT_PARAMS_MODE_STATE_START;
+    currentTreatmentParamsState = HD_TREATMENT_PARAMS_MODE_STATE_WAIT_4_UI_2_SEND;
     // Reset all treatment parameters
     resetAllTreatmentParameters();
 }
@@ -264,7 +264,7 @@
  *************************************************************************/
 void signalAlarmActionToTreatParamsMode( ALARM_ACTION_T action )
 {
-
+    // No special handling of alarm actions in this mode.
 }
 
 /*********************************************************************//**
@@ -276,6 +276,7 @@
  *************************************************************************/
 U32 execTreatParamsMode( void )
 {
+    HD_TREATMENT_PARAMS_MODE_STATE_T priorSubState = currentTreatmentParamsState;
     BOOL stop = isStopButtonPressed();
 
     if ( TRUE == stop )
@@ -286,10 +287,6 @@
     // Execute mode state machine
     switch ( currentTreatmentParamsState )
     {
-        case HD_TREATMENT_PARAMS_MODE_STATE_START:
-            currentTreatmentParamsState = HD_TREATMENT_PARAMS_MODE_STATE_WAIT_4_UI_2_SEND;
-            break;
-
         case HD_TREATMENT_PARAMS_MODE_STATE_WAIT_4_UI_2_SEND:
             currentTreatmentParamsState = handleWaitForUI2SendState();
             break;
@@ -304,6 +301,11 @@
 
     }
 
+    if ( priorSubState != currentTreatmentParamsState )
+    {
+        SEND_EVENT_WITH_2_U32_DATA( HD_EVENT_SUB_STATE_CHANGE, priorSubState, currentTreatmentParamsState );
+    }
+
     return (U32)currentTreatmentParamsState;
 }