Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -r542a50ea0f1958b02ddc8f1824eb534686616e7c -r1d4766a9ba6b087a7c86e776634707d8a1bfceaf
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 542a50ea0f1958b02ddc8f1824eb534686616e7c)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 1d4766a9ba6b087a7c86e776634707d8a1bfceaf)
@@ -171,7 +171,7 @@
 // set via Dialin for calibration check purposes only
 static DIALIN_FILL_FOR_CAL_CHECK_T dialinFillForCalCheck = DIALIN_FILL_FOR_CAL_NONE;                         ///< Dialin fill for calibration check.
 // NOTE: this variable should be initialized here because the init function is called every time and then this variable is set to 0.0.
-static F32 roRejectionRatioFromHD = 0.0F;                                                                    ///< RO rejection ratio from HD.
+static F32 maxRORejectionRatioFromHD = 0.0F;                                                                 ///< Max RO rejection ratio from HD.
 static OVERRIDE_U32_T fillModeDataPublishInterval = { FILL_MODE_DATA_PUB_INTERVAL,
                                                       FILL_MODE_DATA_PUB_INTERVAL, 0, 0 };                   ///< Interval (in ms) at which to publish fill mode data to CAN bus.
 static OVERRIDE_F32_T integratedVolumeML = { 0.0, 0.0, 0.0, 0.0 };                                           ///< Total RO flow rate over period of time.
@@ -551,17 +551,17 @@
 
 /*********************************************************************//**
  * @brief
- * The setRORejectionRatio function sets the RO rejection ratio that has
+ * The setMaxRORejectionRatio function sets the RO rejection ratio that has
  * been received from the HD institutional record.
  * @details Inputs: none
  * @details Outputs: roRejectionRatioFromHD
  * @param RO rejection ratio
  * @return none
  *************************************************************************/
-void setRORejectionRatio( F32 roRejectionRatio )
+void setMaxRORejectionRatio( F32 roRejectionRatio )
 {
-    roRejectionRatioFromHD = roRejectionRatio;
-    SEND_EVENT_WITH_2_F32_DATA( DG_EVENT_RO_REJECTION_RATIO_FROM_HD_INSTIT_RECORD, roRejectionRatioFromHD, 0.0F )
+    maxRORejectionRatioFromHD = roRejectionRatio;
+    SEND_EVENT_WITH_2_F32_DATA( DG_EVENT_RO_REJECTION_RATIO_FROM_HD_INSTIT_RECORD, maxRORejectionRatioFromHD, 0.0F )
 }
 
 /*********************************************************************//**
@@ -927,10 +927,10 @@
                 // Fault alarm per PRS 483
                 SET_ALARM_WITH_2_F32_DATA( ALARM_ID_DG_OUTLET_PRIMARY_CONDUCTIVITY_OUT_OF_RANGE, avgCPo, MAX_CPO_CONDUCTIVITY_ALLOW );
             }
-            if ( ( avgRR > roRejectionRatioFromHD ) && ( isROOnlyModeEnabled() != TRUE ) )
+            if ( ( avgRR > maxRORejectionRatioFromHD ) && ( isROOnlyModeEnabled() != TRUE ) )
             {
                 // Fault alarm per PRS 483
-                SET_ALARM_WITH_2_F32_DATA( ALARM_ID_DG_RO_REJECTION_RATIO_OUT_OF_RANGE, avgRR, roRejectionRatioFromHD );
+                SET_ALARM_WITH_2_F32_DATA( ALARM_ID_DG_RO_REJECTION_RATIO_OUT_OF_RANGE, avgRR, maxRORejectionRatioFromHD );
             }
         }
 
Index: firmware/App/Modes/ModeFill.h
===================================================================
diff -u -r542a50ea0f1958b02ddc8f1824eb534686616e7c -r1d4766a9ba6b087a7c86e776634707d8a1bfceaf
--- firmware/App/Modes/ModeFill.h	(.../ModeFill.h)	(revision 542a50ea0f1958b02ddc8f1824eb534686616e7c)
+++ firmware/App/Modes/ModeFill.h	(.../ModeFill.h)	(revision 1d4766a9ba6b087a7c86e776634707d8a1bfceaf)
@@ -76,7 +76,7 @@
 
 void setAcidAndBicarbType( U32 acid, U32 bicarb );
 
-void setRORejectionRatio( F32 roRejectionRatio );
+void setMaxRORejectionRatio( F32 roRejectionRatio );
 
 BOOL testSetFillModeDataPublishIntervalOverride( U32 value );
 BOOL testResetFillModeDataPublishIntervalOverride( void );
Index: firmware/App/Services/SystemComm.c
===================================================================
diff -u -r542a50ea0f1958b02ddc8f1824eb534686616e7c -r1d4766a9ba6b087a7c86e776634707d8a1bfceaf
--- firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision 542a50ea0f1958b02ddc8f1824eb534686616e7c)
+++ firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision 1d4766a9ba6b087a7c86e776634707d8a1bfceaf)
@@ -977,8 +977,8 @@
             handleSendDGServiceRecordToHD( message );
             break;
 
-        case MSG_ID_HD_RO_REJ_RATIO_FROM_HD_INSTIT_RECORD_TO_DG_RESPONSE:
-            handleRORejectionResponseFromHDInstitRecord( message );
+        case MSG_ID_HD_MAX_RO_REJ_RATIO_FROM_HD_INSTIT_RECORD_RESPONSE:
+            handleMaxRORejectionResponseFromHDInstitRecord( message );
             break;
 
         // NOTE: This case must be last
Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r542a50ea0f1958b02ddc8f1824eb534686616e7c -r1d4766a9ba6b087a7c86e776634707d8a1bfceaf
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 542a50ea0f1958b02ddc8f1824eb534686616e7c)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 1d4766a9ba6b087a7c86e776634707d8a1bfceaf)
@@ -2001,7 +2001,7 @@
 
     // Create a message record
     blankMessage( &msg );
-    msg.hdr.msgID      = MSG_ID_DG_RO_REJ_RATIO_FROM_HD_INSTIT_RECORD_REQUEST;
+    msg.hdr.msgID      = MSG_ID_DG_MAX_RO_REJ_RATIO_FROM_HD_INSTIT_RECORD_REQUEST;
     msg.hdr.payloadLen = 0;
 
     // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
@@ -2010,14 +2010,14 @@
 
 /*********************************************************************//**
  * @brief
- * The handleRORejectionResponseFromHDInstitRecord function handles receiving
- * RO rejection ratio response from HD institutional record
+ * The handleMaxRORejectionResponseFromHDInstitRecord function handles receiving
+ * max RO rejection ratio response from HD institutional record
  * @details Inputs: none
  * @details Outputs: message handled
  * @param message a pointer to the message to handle
  * @return none
  *************************************************************************/
-void handleRORejectionResponseFromHDInstitRecord( MESSAGE_T* message )
+void handleMaxRORejectionResponseFromHDInstitRecord( MESSAGE_T* message )
 {
     BOOL status = FALSE;
 
@@ -2026,8 +2026,8 @@
         F32 roRejectionRatio;
 
         memcpy( &roRejectionRatio, message->payload, sizeof(F32) );
+        setMaxRORejectionRatio( roRejectionRatio );
 
-
         status = TRUE;
     }
 
Index: firmware/App/Services/SystemCommMessages.h
===================================================================
diff -u -r542a50ea0f1958b02ddc8f1824eb534686616e7c -r1d4766a9ba6b087a7c86e776634707d8a1bfceaf
--- firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision 542a50ea0f1958b02ddc8f1824eb534686616e7c)
+++ firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision 1d4766a9ba6b087a7c86e776634707d8a1bfceaf)
@@ -204,8 +204,8 @@
 // MSG_ID_DG_RO_REJ_RATIO_FROM_HD_INSTIT_RECORD_REQUEST
 void sendRORejectionRatioRequestToHD( void );
 
-// MSG_ID_HD_RO_REJ_RATIO_FROM_HD_INSTIT_RECORD_TO_DG_RESPONSE
-void handleRORejectionResponseFromHDInstitRecord( MESSAGE_T* message );
+// MSG_ID_HD_MAX_RO_REJ_RATIO_FROM_HD_INSTIT_RECORD_RESPONSE
+void handleMaxRORejectionResponseFromHDInstitRecord( MESSAGE_T* message );
 
 // *********** public test support message functions **********