Index: MsgDefs.h
===================================================================
diff -u -r549e74166d34b474553b94fb0ef3dac1ca12c286 -r4997b2ccddf764b2789e7469685926a1def4195d
--- MsgDefs.h	(.../MsgDefs.h)	(revision 549e74166d34b474553b94fb0ef3dac1ca12c286)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision 4997b2ccddf764b2789e7469685926a1def4195d)
@@ -98,11 +98,15 @@
     MSG_ID_DG_PRIMING_STATUS_DATA = 0x43,                               ///< HD priming status during cartridge prime
     MSG_ID_DG_UV_REACTORS_DATA = 0x44,                                  ///< DG broadcast UV reactors data
     MSG_ID_DG_THERMISTORS_DATA = 0x45,                                  ///< DG broadcast thermistors data
-    MSG_ID_UI_PRESSURE_LIMITS_CHANGE_REQUEST = 0x46,                    ///< DG broadcast thermistors data
-    MSG_ID_HD_PRESSURE_LIMITS_CHANGE_RESPONSE = 0x47,                   ///< DG broadcast thermistors data
+    MSG_ID_UI_PRESSURE_LIMITS_CHANGE_REQUEST = 0x46,                    ///< UI request to change pressure limits
+    MSG_ID_HD_PRESSURE_LIMITS_CHANGE_RESPONSE = 0x47,                   ///< HD response to change pressure limits request
     MSG_ID_DG_FANS_DATA = 0x48,                                         ///< DG broadcast fans data
     MSG_ID_HD_CALIBRATION_DATA = 0x49,                                  ///< HD broadcast calibration data
     MSG_ID_DG_CALIBRATION_DATA = 0x4A,                                  ///< DG broadcast calibration data
+    MSG_ID_UI_HEPARIN_PAUSE_RESUME_REQUEST = 0x4B,                      ///< UI request to pause/resume Heparin delivery
+    MSG_ID_HD_HEPARIN_PAUSE_RESUME_RESPONSE = 0x4C,                     ///< HD response to pause/resume Heparing delivery request
+    MSG_ID_HD_HEPARIN_DATA_BROADCAST = 0x4D,                            ///< HD broadcast of Heparin delivery data
+    MSG_ID_UI_SET_ALARM_AUDIO_VOLUME_LEVEL_CMD = 0x4E,                  ///< UI command to set alarm audio volume level
 
 #ifdef EMC_TEST_BUILD
     MSG_ID_CAN_ERROR_COUNT = 0x999,  // test code in support of EMC testing