Index: leahi_dialin/dd/proxies/td_proxy.py
===================================================================
diff -u -r9dd43942f571c0f63e69e191b5b33b566a07c641 -re48e2e9af260dc96a407bf4a26f4a18713318ae6
--- leahi_dialin/dd/proxies/td_proxy.py	(.../td_proxy.py)	(revision 9dd43942f571c0f63e69e191b5b33b566a07c641)
+++ leahi_dialin/dd/proxies/td_proxy.py	(.../td_proxy.py)	(revision e48e2e9af260dc96a407bf4a26f4a18713318ae6)
@@ -19,7 +19,7 @@
 
 # Project imports
 from leahi_dialin.common.generic_defs import DataTypes
-from leahi_dialin.common.msg_defs import MsgIds
+from leahi_dialin.common.msg_ids import MsgIds
 from leahi_dialin.common.override_templates import cmd_generic_override
 from leahi_dialin.protocols.CAN import CanMessenger, CanChannels
 from leahi_dialin.utils.abstract_classes import AbstractSubSystem
@@ -147,3 +147,36 @@
                              override_text = 'N/A',
                              logger = self.logger,
                              can_interface = self.can_interface)
+
+
+    def cmd_td_override_treatment_parameter(self, paramID: int, value, reset: int = 0):
+        """
+        Constructs and sends a treatment parameter override request.
+        @param paramID : integer - Treatment parameter ID
+        @param value   : float or integer - Override value
+        @param reset   : integer 1 to reset override, 0 to apply override
+        @returns None
+        """
+
+        rst = integer_to_bytearray(reset)
+        pid = integer_to_bytearray(paramID)
+        # Dialysate rate, UF rate and dialysate temperature are f32
+        float_params = [ 0, 1, 2 ]
+        # Acid type and bicarbonate type are u32
+        uint_params = [ 3, 4 ]
+        if paramID in float_params:
+            val = float_to_bytearray(float(value))
+        elif paramID in uint_params:
+            val = integer_to_bytearray(int(value))
+        else:
+            val = integer_to_bytearray(int(value))
+        payload = rst + val + pid
+
+        cmd_generic_override(payload = payload,
+                             reset = None,
+                             channel_id = DenaliChannels.dialin_to_dd_ch_id,
+                             msg_id = MsgIds.MSG_ID_DD_TREATMENT_PARAMS_OVERRIDE_REQUEST,
+                             entity_name = f'DD treatment parameter override: id={paramID}, value={value}, reset={reset}',
+                             override_text = 'N/A',
+                             logger = self.logger,
+                             can_interface = self.can_interface)