Index: firmware/App/Modes/ModeTreatment.c
===================================================================
diff -u -rd91a24c730aeb5cd7e3eba9ef4eca78e442911f8 -rf3b83f75a19b975ad1abead662c8151a2907ac00
--- firmware/App/Modes/ModeTreatment.c	(.../ModeTreatment.c)	(revision d91a24c730aeb5cd7e3eba9ef4eca78e442911f8)
+++ firmware/App/Modes/ModeTreatment.c	(.../ModeTreatment.c)	(revision f3b83f75a19b975ad1abead662c8151a2907ac00)
@@ -22,12 +22,14 @@
 #include "DialInFlow.h"
 #include "DialOutFlow.h"
 #include "Dialysis.h"
-#include "TaskGeneral.h"
+#include "ModeTreatment.h"
+#include "ModeTreatmentParams.h"
 #include "OperationModes.h"
 #include "SystemCommMessages.h"
+#include "TaskGeneral.h"
 #include "Timers.h"
 #include "TreatmentStop.h"
-#include "ModeTreatment.h"
+#include "Utilities.h"
 #ifdef RM46_EVAL_BOARD_TARGET
     #include "Timers.h"
     static U32 start;
@@ -712,6 +714,92 @@
 
 /*********************************************************************//**
  * @brief
+ * The verifyPressureLimitsChange function verifies a user change request
+ * for in-line pressure alarm limits.  If valid, new limits are accepted
+ * and set.
+ * @details Inputs: none
+ * @details Outputs: new pressure limits set, response sent
+ * @return TRUE if new pressure limits accepted, FALSE if not.
+ *************************************************************************/
+BOOL verifyPressureLimitsChange( PRESSURE_LIMIT_CHANGE_REQUEST_T *data )
+{
+    BOOL result = TRUE;
+    CRITICAL_DATAS_T proposedNewArtLowLimit, proposedNewArtHighLimit;
+    CRITICAL_DATAS_T proposedNewVenLowLimit, proposedNewVenHighLimit;
+    PRESSURE_LIMIT_CHANGE_RESPONSE_T respRecord = { FALSE, 0, 0, 0, 0, 0 };
+
+    proposedNewArtLowLimit.sInt = data->artLowLimit;
+    proposedNewArtHighLimit.sInt = data->artHighLimit;
+    proposedNewVenLowLimit.sInt = data->venLowLimit;
+    proposedNewVenHighLimit.sInt = data->venHighLimit;
+
+    // check ranges for changed limits
+    if ( FALSE == isTreatmentParamInRange( TREATMENT_PARAM_ART_PRESSURE_LOW_LIMIT, proposedNewArtLowLimit ) )
+    {
+        respRecord.rejReasonCode = REQUEST_REJECT_REASON_PARAM_OUT_OF_RANGE;
+        result = FALSE;
+    }
+    if ( FALSE == isTreatmentParamInRange( TREATMENT_PARAM_ART_PRESSURE_HIGH_LIMIT, proposedNewArtHighLimit ) )
+    {
+        respRecord.rejReasonCode = REQUEST_REJECT_REASON_PARAM_OUT_OF_RANGE;
+        result = FALSE;
+    }
+    if ( FALSE == isTreatmentParamInRange( TREATMENT_PARAM_VEN_PRESSURE_LOW_LIMIT, proposedNewVenLowLimit ) )
+    {
+        respRecord.rejReasonCode = REQUEST_REJECT_REASON_PARAM_OUT_OF_RANGE;
+        result = FALSE;
+    }
+    if ( FALSE == isTreatmentParamInRange( TREATMENT_PARAM_VEN_PRESSURE_HIGH_LIMIT, proposedNewVenHighLimit ) )
+    {
+        respRecord.rejReasonCode = REQUEST_REJECT_REASON_PARAM_OUT_OF_RANGE;
+        result = FALSE;
+    }
+
+    // if ranges ok, check separation between low/high limits
+    if ( TRUE == result )
+    {
+        S32  arterialPresLimitDelta = data->artHighLimit - data->artLowLimit;
+        S32  venousPresLimitDelta = data->venHighLimit - data->venLowLimit;
+
+        // check arterial alarm limits dependency
+        if ( arterialPresLimitDelta < MIN_PRESSURE_ALARM_LIMIT_DELTA_MMHG )
+        {
+            respRecord.rejReasonCode = REQUEST_REJECT_REASON_ARTERIAL_PRESSURE_LOW_VS_HIGH;
+            result = FALSE;
+        }
+
+        // check venous alarm limits dependency
+        if ( venousPresLimitDelta < MIN_PRESSURE_ALARM_LIMIT_DELTA_MMHG )
+        {
+            respRecord.rejReasonCode = REQUEST_REJECT_REASON_VENOUS_PRESSURE_LOW_VS_HIGH;
+            result = FALSE;
+        }
+    }
+
+    // set overall result - are changes accepted?
+    respRecord.accepted = result;
+
+    // if changes accepted, set new pressure limits and read back for transmit to UI.
+    if ( TRUE == result )
+    {
+        setTreatmentParameterS32( TREATMENT_PARAM_ART_PRESSURE_LOW_LIMIT, data->artLowLimit );
+        setTreatmentParameterS32( TREATMENT_PARAM_ART_PRESSURE_HIGH_LIMIT, data->artHighLimit );
+        setTreatmentParameterS32( TREATMENT_PARAM_VEN_PRESSURE_LOW_LIMIT, data->venLowLimit );
+        setTreatmentParameterS32( TREATMENT_PARAM_VEN_PRESSURE_HIGH_LIMIT, data->venHighLimit );
+        respRecord.artLowLimit = getTreatmentParameterS32( TREATMENT_PARAM_ART_PRESSURE_LOW_LIMIT );
+        respRecord.artHighLimit = getTreatmentParameterS32( TREATMENT_PARAM_ART_PRESSURE_HIGH_LIMIT );
+        respRecord.venLowLimit = getTreatmentParameterS32( TREATMENT_PARAM_VEN_PRESSURE_LOW_LIMIT );
+        respRecord.venHighLimit = getTreatmentParameterS32( TREATMENT_PARAM_VEN_PRESSURE_HIGH_LIMIT );
+    }
+
+    // send response
+    sendChangePressureLimitsChangeResponse( &respRecord );
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
  * The broadcastTreatmentTimeAndState function broadcasts treatment time and
  * state data during treatment.
  * @details