Index: dialin/hd/valves.py
===================================================================
diff -u -r3a70bfb451b74106348c064c34f19934aadd9119 -r517cb39b43e80b21113d083fcc890343f49dc73d
--- dialin/hd/valves.py	(.../valves.py)	(revision 3a70bfb451b74106348c064c34f19934aadd9119)
+++ dialin/hd/valves.py	(.../valves.py)	(revision 517cb39b43e80b21113d083fcc890343f49dc73d)
@@ -37,6 +37,7 @@
 
 @unique
 class ValvesPositions(DialinEnum):
+    VALVE_POSITION_NOT_IN_POSITION = 0
     VALVE_POSITION_A_INSERT_EJECT = 1
     VALVE_POSITION_B_OPEN = 2
     VALVE_POSITION_C_CLOSE = 3