Index: dialin/hd/syringe_pump.py
===================================================================
diff -u -r8fcde658a845e638e91e7ab15b9738fcc2f0318c -r4036036ad77f9df475aba4ffb0e52f9182172ed5
--- dialin/hd/syringe_pump.py	(.../syringe_pump.py)	(revision 8fcde658a845e638e91e7ab15b9738fcc2f0318c)
+++ dialin/hd/syringe_pump.py	(.../syringe_pump.py)	(revision 4036036ad77f9df475aba4ffb0e52f9182172ed5)
@@ -745,3 +745,32 @@
             self.logger.debug("Timeout!!!!")
             return False
 
+    def cmd_heprin_target_rate_override(self, rate: float, reset: int = NO_RESET) -> int:
+        """
+        Constructs and sends the heprin bolus target rate value override command
+        Constraints:
+            Must be logged into HD.
+
+        @param rate: (float) the heparin bolus target rate to be set in mL/hour
+        @param reset: (int) 1 to reset a previous override, 0 to override
+        @return 1 if successful, zero otherwise
+        """
+        reset_value = integer_to_bytearray(reset)
+        vlu = float_to_bytearray(rate)    # HD expects the rate in mL/hour
+        payload = reset_value + vlu
+
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
+                                              message_id=MsgIds.MSG_ID_HD_HEPRIN_BOLUS_TARGET_RATE_OVERRIDE.value,
+                                              payload=payload)
+        self.logger.debug("Overriding heprin bolus target rate value override")
+
+        # Send message
+        received_message = self.can_interface.send(message)
+
+        # If there is content...
+        if received_message is not None:
+            # response payload is OK or not OK
+            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
+        else:
+            self.logger.debug("Heprin bolus target value override Timeout!!!")
+            return False