Index: leahi_dialin/ui/td_messaging.py
===================================================================
diff -u -r36636063d8db4e2792ee5002ae2f92e2b41c4bcd -rb37f6de135a6bedb66753f17d7623af59b15145a
--- leahi_dialin/ui/td_messaging.py	(.../td_messaging.py)	(revision 36636063d8db4e2792ee5002ae2f92e2b41c4bcd)
+++ leahi_dialin/ui/td_messaging.py	(.../td_messaging.py)	(revision b37f6de135a6bedb66753f17d7623af59b15145a)
@@ -428,8 +428,8 @@
         self.can_interface.send(message, 0)
 
     def td_heparin( self, 
-                    target          : float , 
                     cumulative      : float , 
+                    target          : float , 
                     time_remaining  : int   ):
         """
         Broadcasts the current TD Heparin data (Msg ID: 0xXX, XX)
@@ -443,9 +443,9 @@
             raise ValueError("CAN Interface is not enabled")
 
 
-        payload =  conversions.float_to_bytearray           (target      )
-        payload += conversions.float_to_bytearray           (cumulative  )
-        payload += conversions.unsigned_integer_to_bytearray(time_remaining       )
+        payload =  conversions.float_to_bytearray           (cumulative         )
+        payload += conversions.float_to_bytearray           (target             )
+        payload += conversions.unsigned_integer_to_bytearray(time_remaining     )
 
         message = CAN.CanMessage.build_message(
                                             channel_id=CAN.CanChannels.td_sync_broadcast_ch_id,