Index: AlarmDefs.h
===================================================================
diff -u -r8219c9f20e276239665c0e1ba6ae573c1085aa7d -r68a17e52574cb3864d68d683b0b549fe79cd1178
--- AlarmDefs.h	(.../AlarmDefs.h)	(revision 8219c9f20e276239665c0e1ba6ae573c1085aa7d)
+++ AlarmDefs.h	(.../AlarmDefs.h)	(revision 68a17e52574cb3864d68d683b0b549fe79cd1178)
@@ -1,6 +1,6 @@
 /**********************************************************************//**
  *
- *  Copyright (c) 2020 Diality Inc. - All Rights Reserved.
+ *  Copyright (c) 2019-2020 Diality Inc. - All Rights Reserved.
  *
  *  THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
  *  WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
Index: MsgDefs.h
===================================================================
diff -u -rf5d21b7903611d07724a9133628df44670ffdb9d -r68a17e52574cb3864d68d683b0b549fe79cd1178
--- MsgDefs.h	(.../MsgDefs.h)	(revision f5d21b7903611d07724a9133628df44670ffdb9d)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision 68a17e52574cb3864d68d683b0b549fe79cd1178)
@@ -46,8 +46,13 @@
     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_USER_BLOOD_DIAL_RATE_CHANGE_RESPONSE = 0x18,                 ///< HD response to user request to change blood and dialysate rates.
     MSG_ID_SET_DG_DIALYSATE_TEMP_TARGETS = 0x19,                        ///< HD provides DG with dialysate temperature set points.
+    MSG_ID_TREATMENT_PARAM_CHANGE_RANGES = 0x1A,                        ///< HD provides several parameter change ranges as they evolve over treatment duration
+    MSG_ID_USER_TREATMENT_TIME_CHANGE_RESPONSE = 0x1B,                  ///< HD response to user request to change treatment duration.
+    MSG_ID_REQUEST_FW_VERSIONS = 0x1C,                                  ///< UI request for f/w versions.
+    MSG_ID_HD_VERSION = 0x1D,                                           ///< HD f/w version.
+    MSG_ID_DG_VERSION = 0x1E,                                           ///< DG f/w version.
 
     // service/test CAN messages
 
@@ -96,18 +101,14 @@
     MSG_ID_DG_MESSAGE = 0xA001,
     MSG_ID_DG_WATCHDOG_TASK_CHECKIN_OVERRIDE = 0xA002,
     MSG_ID_DG_SET_RTC_DATE_TIME = 0xA004,
-    MSG_ID_LOAD_CELL_A1_OVERRIDE = 0xA005,
-    MSG_ID_LOAD_CELL_A2_OVERRIDE = 0xA006,
-    MSG_ID_LOAD_CELL_B1_OVERRIDE = 0xA007,
-    MSG_ID_LOAD_CELL_B2_OVERRIDE = 0xA008,
-
+    MSG_ID_LOAD_CELL_OVERRIDE = 0xA005,
     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_NONE = 0,                                     ///< Used when there is no rejection.
     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.