Index: leahi_dialin/td/modules/valves.py
===================================================================
diff -u -re45b20cdc5d4c5dcff8cef530b173ca94cb2e422 -r9c2fab5b413da62b218e6a9a12a5752e974071a0
--- leahi_dialin/td/modules/valves.py	(.../valves.py)	(revision e45b20cdc5d4c5dcff8cef530b173ca94cb2e422)
+++ leahi_dialin/td/modules/valves.py	(.../valves.py)	(revision 9c2fab5b413da62b218e6a9a12a5752e974071a0)
@@ -70,13 +70,13 @@
         msg_list.append(('Valve',           DataTypes.U32))
         msg_list.append(('State',           DataTypes.U32))
         msg_list.append(('PosID',           DataTypes.U32))
-        msg_list.append(('PosCnt',          DataTypes.U16))
-        msg_list.append(('Cmd',             DataTypes.U16))
-        msg_list.append(('PosA',            DataTypes.U16))
-        msg_list.append(('PosB',            DataTypes.U16))
-        msg_list.append(('PosC',            DataTypes.U16))
-        msg_list.append(('PosD',            DataTypes.U16))
-        msg_list.append(('Max_homing_enc',  DataTypes.U16))
+        msg_list.append(('PosCnt',          DataTypes.S16))
+        msg_list.append(('Cmd',             DataTypes.S16))
+        msg_list.append(('PosA',            DataTypes.S16))
+        msg_list.append(('PosB',            DataTypes.S16))
+        msg_list.append(('PosC',            DataTypes.S16))
+        msg_list.append(('PosD',            DataTypes.S16))
+        msg_list.append(('Max_homing_enc',  DataTypes.S16))
 
         result = self.process_into_vars(decoder_list = msg_list,
                                         message = message)