Index: AlarmDefs.h
===================================================================
diff -u -re18ec8e1d17b3e29993c966c53992b18cda5a799 -r282104180982bcd85b8cecd7f5a7f757831dc250
--- AlarmDefs.h	(.../AlarmDefs.h)	(revision e18ec8e1d17b3e29993c966c53992b18cda5a799)
+++ AlarmDefs.h	(.../AlarmDefs.h)	(revision 282104180982bcd85b8cecd7f5a7f757831dc250)
@@ -58,12 +58,12 @@
     ALARM_ID_ARTERIAL_PRESSURE_HIGH = 33,                           ///< Arterial pressure too high during treatment.
     ALARM_ID_VENOUS_PRESSURE_LOW = 34,                              ///< Venous pressure too low during treatment.
     ALARM_ID_VENOUS_PRESSURE_HIGH = 35,                             ///< Venous pressure too high during treatment.
-    ALARM_ID_UF_RATE_ACCURACY_ERROR = 36,                           ///< Ultrafiltration rate accuracy error during treatment.
+    ALARM_ID_UF_RATE_TOO_HIGH_ERROR = 36,                           ///< Ultrafiltration rate accuracy error during treatment.
     ALARM_ID_UF_VOLUME_ACCURACY_ERROR = 37,                         ///< Ultrafiltration volume accuracy error during treatment.
     ALARM_ID_RTC_BATTERY_LOW = 38,                                  ///< RTC battery low.
     ALARM_ID_RTC_OR_TIMER_ACCURACY_FAILURE = 39,                    ///< RTC or MCU timer inaccurate.
-    ALARM_ID_NVDATA_EEPROM_OPS_FAILURE = 40,                        ///< EEPRON operations (read, write, erase) failure.
-    ALARM_ID_RTC_RAM_OPS_ERROR = 41,                                ///< RTC (i.e read time) or RAM operations failure (read or write).
+    ALARM_ID_RTC_RAM_OPS_ERROR = 40,                                ///< RTC (i.e read time) or RAM operations failure (read or write).
+    ALARM_ID_NVDATA_EEPROM_OPS_FAILURE = 41,                        ///< EEPRON operations (read, write, erase) failure.
     ALARM_ID_NVDATA_MFG_RECORD_CRC_ERROR = 42,                      ///< Manufacturing record CRC failure.
     ALARM_ID_NVDATA_SRVC_RECORD_CRC_ERROR = 43,                     ///< Service record CRC failure.
     ALARM_ID_NVDATA_CAL_RECORD_CRC_ERROR = 44,                      ///< Calibration record CRC failure.
Index: MsgDefs.h
===================================================================
diff -u -r73ef0c58ea2b67ec0115fbd1504eb72d2a635737 -r282104180982bcd85b8cecd7f5a7f757831dc250
--- MsgDefs.h	(.../MsgDefs.h)	(revision 73ef0c58ea2b67ec0115fbd1504eb72d2a635737)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision 282104180982bcd85b8cecd7f5a7f757831dc250)
@@ -45,6 +45,9 @@
     MSG_ID_USER_SALINE_BOLUS_RESPONSE = 0x14,                           ///< HD response to user saline bolus request.
     MSG_ID_USER_CONFIRM_UF_SETTINGS_CHANGE = 0x15,                      ///< User confirmation of ultrafiltration settings change.
     MSG_ID_USER_TREATMENT_TIME_CHANGE_REQUEST = 0x16,                   ///< User request to change treatment duration.
+    MSG_ID_USER_BLOOD_DIAL_RATE_CHANGE_REQUEST = 0x17,                  ///< User request to change blood and dialysate rates.
+    MSG_ID_USER_BLOOD_DIAL_RATE_CHANGE_RESPONSE = 0x18,                 ///< HD response to user to change blood and dialysate rates.
+    MSG_ID_SET_DG_DIALYSATE_TEMP_TARGETS = 0x19,                        ///< HD provides DG with dialysate temperature set points.
 
     // service/test CAN messages
 
@@ -101,4 +104,23 @@
     END_OF_MSG_IDS                                                      ///< # of system message IDs.
 } MSG_ID_T;
 
+/// Settings change rejection reason codes.
+typedef enum Request_Reject_Reasons
+{
+    REQUEST_REJECT_REASON_NONE = 0,                                     ///< No reason.
+    REQUEST_REJECT_REASON_NOT_ALLOWED_IN_CURRENT_MODE,                  ///< Request is not allowed in the current operating mode.
+    REQUEST_REJECT_REASON_TIMEOUT_WAITING_FOR_USER_CONFIRM,             ///< Validated request was not confirmed by user in reasonable time.
+    REQUEST_REJECT_REASON_NOT_IN_TREATMENT_MODE,                        ///< Request is not allowed if not in treatment mode.
+    REQUEST_REJECT_REASON_INVALID_TREATMENT_STATE,                      ///< Request is not allowed in current treatment state.
+    REQUEST_REJECT_REASON_TREATMENT_TOO_CLOSE_TO_FINISHED,              ///< Request is not allowed so near end of treatment.
+    REQUEST_REJECT_REASON_TREATMENT_TIME_OUT_OF_RANGE,                  ///< Treatment duration is out of range.
+    REQUEST_REJECT_REASON_TREATMENT_TIME_LESS_THAN_CURRENT,             ///< Treatment time change is less than currently elapsed treatment time.
+    REQUEST_REJECT_REASON_BLOOD_FLOW_OUT_OF_RANGE,                      ///< Blood flow is out of range.
+    REQUEST_REJECT_REASON_DIAL_FLOW_OUT_OF_RANGE,                       ///< Dialysate flow is out of range.
+    REQUEST_REJECT_REASON_DIAL_VOLUME_OUT_OF_RANGE,                     ///< Dialysate flow rate or treatment duration causes dialysate volume to exceed limit.
+    REQUEST_REJECT_REASON_UF_VOLUME_OUT_OF_RANGE,                       ///< Ultrafiltration volume is out of range.
+    REQUEST_REJECT_REASON_UF_RATE_OUT_OF_RANGE,                         ///< Ultrafiltration rate is out of range.
+    NUM_OF_REQUEST_REJECT_REASONS                                       ///< Number of settings change reject codes.
+} REQUEST_REJECT_REASON_CODE_T;
+
 #endif