Index: firmware/App/Services/TDInterface.c
===================================================================
diff -u -rbd522c8ffdf75130571e5b6a79d1b1d6acd78b1c -re5c384741feb64828c1f4c32ff6daca07b20f46e
--- firmware/App/Services/TDInterface.c	(.../TDInterface.c)	(revision bd522c8ffdf75130571e5b6a79d1b1d6acd78b1c)
+++ firmware/App/Services/TDInterface.c	(.../TDInterface.c)	(revision e5c384741feb64828c1f4c32ff6daca07b20f46e)
@@ -95,6 +95,7 @@
 static U32 tdSubMode;                                                      ///< Current state (sub-mode) of current TD operation mode.
 static BOOL tdDialyzerBypass;                                              ///< TD dialyzer bypass
 static BOOL tdOpModeDataFreshFlag = FALSE;                                 ///< Flag to signal/process fresh TD op mode data
+static BOOL tdRxEntered;                                                   ///< TRUE when TD has entered treatment Rx (dialysate delivery params)
 
 static OVERRIDE_F32_T tdDialysateFlowrate;                                 ///< TD Dialysate flow rate
 static OVERRIDE_F32_T tdUFRate;                                            ///< TD ultrafiltration rate
@@ -123,6 +124,7 @@
     tdSubMode                           = 0U;
     tdDialyzerBypass                    = FALSE;
     tdOpModeDataFreshFlag               = FALSE;
+    tdRxEntered                         = FALSE;
 
     // Initialize treatment parameters from TD
     tdDialysateFlowrate.data            = 0.0F;
@@ -320,6 +322,20 @@
 
 /*********************************************************************//**
  * @brief
+ * The setTDRxEntered function records whether TD has entered treatment Rx
+ * parameters (used for PreGen conductivity tolerance bands).
+ * @details \b Inputs: rxEntered
+ * @details \b Outputs: tdRxEntered
+ * @param rxEntered TRUE when treatment Rx has been entered
+ * @return none
+ *************************************************************************/
+void setTDRxEntered( BOOL rxEntered )
+{
+    tdRxEntered = rxEntered;
+}
+
+/*********************************************************************//**
+ * @brief
  * The setTDAcidAndBicarbType function sets the acid and bicarb types to be
  * used in dialysate generation.
  * @details \b Inputs: none
@@ -400,6 +416,21 @@
     return tdDialyzerBypass;
 }
 
+/*********************************************************************//**
+ * @brief
+ * The getTDRxEntered function reports whether TD has entered treatment Rx
+ * parameters.
+ * @details \b Inputs: tdRxEntered
+ * @details \b Outputs: none
+ * @return TRUE when treatment Rx has been entered
+ *************************************************************************/
+BOOL getTDRxEntered( void )
+{
+    BOOL result = tdRxEntered;
+
+    return result;
+}
+
 /******************************************************************************
  * @brief
  * The getTDAcidConversionFactor function gets the latest Acid concentrate
@@ -564,6 +595,7 @@
             setTDDialyzerBypass( startTxRequest.bypassDialyzer );
             tdSubstitutionFlowRate.data = startTxRequest.substitutionRate;
             setSubstitutionPumpTargetRate( D92_PUMP,  getTDSubstitutionFlowRate() );
+            setTDRxEntered( TRUE );
 
             // start dialysate generation
             result = requestDDGenDialStart();
@@ -595,6 +627,7 @@
                 setTDDialyzerBypass( startTxRequest.bypassDialyzer );
                 tdSubstitutionFlowRate.data = startTxRequest.substitutionRate;
                 setSubstitutionPumpTargetRate( D92_PUMP,  getTDSubstitutionFlowRate() );
+                setTDRxEntered( TRUE );
 
                 // Signal to update treatement parameters
                 setTreatmentParamUpdate();