Is there such a thing as a discrete On / Off code for X-10?

Well, kind of. There are two types of X10 codes:

"Generic":
ON, OFF, DIM UP, DIM DOWN, (and then unit numbers:) 1, 2, 3, etc.

"Specific":
1 ON, 1 OFF, 2 ON, 2 OFF, etc.

David
www.BlueDo.com

On most OFA remotes the ch+ is ON and the ch- is OFF. I've never heard of X10 power toggle. If your talking about a command with an address and On command together, I think you need a pronto for that.

How can I program a OFA for the "Specific" ones? hifi-remote.com lists the codes as:

0167 243 Silent Alarm


HOME AUTOMATION.
ONE-FOR-ALL SECURITY SYSTEM (X10).
143 1...............1
205 0...............10
206 REWIND..........11
204 PLAY............12
014 FAST FORWARD....13
012 RECORD..........14
015 STOP............15
013 PAUSE...........16
141 2...............2
142 3...............3
140 4...............4
078 5...............5
076 6...............6
079 7...............7
077 8...............8
207 9...............9
046 POWER...........All Lights On
238 MUTE............All Off
018 UP..............Arm (Max)
242 DOWN............Arm (Min)
047 VOLUME UP.......Bright
018 UP..............Delay Away Arm
210 RIGHT...........Delay Home Arm
239 VOLUME DOWN.....Dim
082 SELECT..........Disarm
210 RIGHT...........HomeArm(Max)
178 LEFT............HomeArm(Min)
242 DOWN............Inst Away Arm
178 LEFT............Inst Home Arm
019 CLEAR...........Medic Alarm
174 CHANNEL DOWN....Off
110 CHANNEL UP......On
114 RECALL..........Panic
146 TV/VCR..........Sec Light Off
050 ENTER...........Sec Light On

You can't, that's why you need Pronto remote.

No, just get a JP1 cable and you can utilize the Pronto files with many inexpensive One For All remotes!

David
www.BlueDo.com