Index: dialin/common/msg_defs.py
===================================================================
diff -u -rd531ce09d0240e0ae542ea33cf8ebe4b8169825b -r7855e1d1ce4e02adf55f4ac67e99ee024cb69107
--- dialin/common/msg_defs.py	(.../msg_defs.py)	(revision d531ce09d0240e0ae542ea33cf8ebe4b8169825b)
+++ dialin/common/msg_defs.py	(.../msg_defs.py)	(revision 7855e1d1ce4e02adf55f4ac67e99ee024cb69107)
@@ -186,7 +186,6 @@
     MSG_ID_HEAT_DISINFECT_PUBLISH_INTERVAL_OVERRIDE = 0xA021    # Heat disinfection data publish interval override request
     MSG_ID_PRIMING_STATUS = 0x0037                              # The priming status
     MSG_ID_DG_SOFTWARE_RESET_REQUEST = 0xA022                   # DG reset request
-    MSG_ID_DG_OPERATION_MODE_REQUEST = 0xA023                   # DG change operation mode request
     MSG_ID_CONCENTRATE_PUMP_TARGET_SPEED_OVERRIDE = 0xA024      # Concentrate pump target speed override request
     MSG_ID_CONCENTRATE_PUMP_STATE_CHANGE_REQUEST = 0xA026       # Concentrate pump state change request
 
Index: dialin/dg/dialysate_generator.py
===================================================================
diff -u -r942bc248fa5a9966cbda891acf725807fc0979eb -r7855e1d1ce4e02adf55f4ac67e99ee024cb69107
--- dialin/dg/dialysate_generator.py	(.../dialysate_generator.py)	(revision 942bc248fa5a9966cbda891acf725807fc0979eb)
+++ dialin/dg/dialysate_generator.py	(.../dialysate_generator.py)	(revision 7855e1d1ce4e02adf55f4ac67e99ee024cb69107)
@@ -323,34 +323,3 @@
             self.logger.debug("Timeout!!!!")
             return False
 
-    def cmd_dg_change_operation_mode_request(self, mode=0):
-        """
-        Constructs and sends an DG change operation mode request via CAN bus.
-        Constraints:
-            Must be logged into DG.
-
-        \returns response message if received, False if no response received
-
-        @return: 1 if successful, zero otherwise
-
-        """
-
-        mode_byte_array = integer_to_bytearray(mode)
-        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_dg_ch_id,
-                                              message_id=MsgIds.MSG_ID_DG_OPERATION_MODE_REQUEST.value,
-                                              payload=mode_byte_array)
-
-        self.logger.debug("requesting DG operation mode change")
-
-        # Send message
-        received_message = self.can_interface.send(message)
-
-        if received_message is not None:
-            if received_message['message'][DenaliMessage.PAYLOAD_START_INDEX] == 1:
-                self.logger.debug("request changing DG operation mode succesfully...")
-            else:
-                self.logger.debug("DG operation mode change request failed.")
-            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
-        else:
-            self.logger.debug("Timeout!!!!")
-            return False