Index: dialin/hd/syringe_pump.py
===================================================================
diff -u -radae506afce35a0063c6c2baf7e8580986f3bee7 -r1230c685476b4fe0aee90ecf07b553725c1a3e92
--- dialin/hd/syringe_pump.py	(.../syringe_pump.py)	(revision adae506afce35a0063c6c2baf7e8580986f3bee7)
+++ dialin/hd/syringe_pump.py	(.../syringe_pump.py)	(revision 1230c685476b4fe0aee90ecf07b553725c1a3e92)
@@ -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 target rate value override command
+        Constraints:
+            Must be logged into HD.
+    
+        @param rate: (float) the target rate to be set
+        @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 broadcast 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
\ No newline at end of file
Index: tests/test_heprin_bolus_target_rate.py
===================================================================
diff -u
--- tests/test_heprin_bolus_target_rate.py	(revision 0)
+++ tests/test_heprin_bolus_target_rate.py	(revision 1230c685476b4fe0aee90ecf07b553725c1a3e92)
@@ -0,0 +1,37 @@
+###########################################################################
+#
+# Copyright (c) 2019-2022 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.
+#
+# @file    test_heprin_target_rate.py
+#
+# @author  (last)      Hung Nguyen
+# @date    (last)      12-Feb-2022
+# @author  (original)  Hung Nguyen
+# @date    (original)  29-Oct-2021
+#
+############################################################################
+
+import sys
+sys.path.append("..")
+from dialin.hd.hemodialysis_device import HD
+from dialin.dg.dialysate_generator import DG
+from time import sleep
+
+if __name__ == "__main__":
+
+    # Create a heprin bolus set target rate object called df_object
+    hd_object = HD()
+    hd_object.cmd_log_in_to_dg()
+
+    hd_object.syringe_pump.cmd_heprin_target_rate_override(30.0)
+
+
+
+
+
+
+
+