Index: MsgDefs.h
===================================================================
diff -u -rbeb042448edd7861fb1760e9d090fb8bcc173556 -r103db1a14cca87287c71cee3397a9f7c0624c140
--- MsgDefs.h	(.../MsgDefs.h)	(revision beb042448edd7861fb1760e9d090fb8bcc173556)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision 103db1a14cca87287c71cee3397a9f7c0624c140)
@@ -8,8 +8,8 @@
 *
 * @file    MsgDefs.h
 *
-* @author  (last)      Vijay Pamula
-* @date    (last)      28-May-2026
+* @author  (last)      Praneeth Bunne
+* @date    (last)      04-Jun-2026
 *
 * @author  (original)  Sean Nash
 * @date    (original)  01-Aug-2024
@@ -210,6 +210,7 @@
     MSG_ID_TD_HEPARIN_PAUSE_RESUME_RESPONSE= 0xB2,                                  ///< TD response to pause/resume Heparin delivery request
     MSG_ID_FFU_SIGNAL_TD_UPDATE_AVAILABLE = 0xB3,                                   ///< FFU signal TD update is available.
     MSG_ID_FFU_SIGNAL_DD_UPDATE_AVAILABLE = 0xB4,                                   ///< FFU signal DD update is available.
+    MSG_ID_DD_SUBSTITUTION_PUMP_DATA = 0xB5,                                        ///< DD substitution pump broadcast data.
     MSG_ID_DD_CONDUCTIVITY_SENSOR_RESISTANCE_DATA = 0xB6,                           ///< DD conductivity resistance data broadcast.
 
     // service/test CAN messages
@@ -409,9 +410,10 @@
     MSG_ID_DD_DIALYSATE_DELTA_CONDUCTIVITY_OVERRIDE_REQUEST = 0xA069,                   ///< DD Dialysate delta target conductivity override
     MSG_ID_DD_BICART_UPPER_PRESSURE_OVERRIDE_REQUEST = 0xA06A,                          ///< DD bicarb cartridge upper threshold pressure override
     MSG_ID_DD_BICART_LOWER_PRESSURE_OVERRIDE_REQUEST = 0xA06B,                          ///< DD bicarb cartridge lower threshold pressure override
-    MSG_ID_DD_FLOATER_LEVEL_OVERRIDE_REQUEST = 0xA06C,                                  ///< DD floater level override request
+    MSG_ID_DD_FLOATER_LEVEL_OVERRIDE_REQUEST = 0xA06C,                                  ///< DD override request for D6 floater level override
     MSG_ID_DD_SUBSTITUTION_PUMP_START_STOP_OVERRIDE_REQUEST = 0xA06D,                   ///< DD substitution pump start stop override request
     MSG_ID_DD_SUBSTITUTION_PUMP_BROADCAST_OVERRIDE_REQUEST = 0xA06E,                    ///< DD substitution pump broadcast override request
+    MSG_ID_DD_SUBSTITUTION_PUMP_TARGET_SPEED_OVERRIDE_REQUEST = 0xA06F,                 ///< DD substitution pump target speed override request.
 
     MSG_ID_FIRST_FP_TESTER_MESSAGE = 0xB000,                                            ///< First FP test message ID
     MSG_ID_FP_TESTER_LOGIN_REQUEST = MSG_ID_FIRST_FP_TESTER_MESSAGE,                    ///< FP tester log-in