Atlas tmcc Erie Built takes off while in pgm mode

In conventional mode the Run/ Program switch becomes the lock out switch when set to program.

I suppose the first thing I would do is put the switch back to run and let us know  what the engine is doing.

You don't need to use the program switch unless changing the engine's ID.

Seems your layout  or engine is missing the TMCC signal,   Do you have another TMCC engine? What does it do?

It doesn't respond to its assigned engine number (90).  The sound comes up with track power but no response to cab 1 commands (throttle, nor aux2, nor any of the aux1 keypad, nor couplers, nor boost, nor brake.  All I get is the engine sounds a few seconds after powering up--just like in pgm, but without the wheels turning.

I just reprogrammed its companion A unit with no problems on the very same track location.  I have no idea what mistake I might have made in the initial eob step programming, so I need to reassign the engine id and/or try restoring factory settings--but can't do anything while it is running full blast in pgm.  Anyone know if there might be a chance of powering it up in an engine cradle and letting it run away while trying to do some programming?

The symptoms suggest it's not receiving a TMCC signal, so I think you need to address that first.  After one "grace" power on with no TMCC signal, a TMCC engine will start in forward as soon as it detects there is no TMCC track signal.  That's why the sound come up with no commands and the engine takes off.

I think there's actually an issue with the engine, the fact that it happened while trying to change the configuration may have just been happenstance.

Id make sure the antennae is connected to the board

Success--so far.  I had been turning on power to the entire layout through my DCS system with the unit on the track.  When I tried gently placing the loco on the powered up track it sat obediently like it should and allowed me to address it and regain control.  I know DCS sends an initial watchdog signal but had never run into that before with TMCC.

Anyway all seems to be well except the loco headlight/Mars light doesn't go out in reverse but I can easily live with that.  The Erie-Built warbonnets are ready to return to Cajon Pass.

Thanks for the replies.  Maybe my brain fade will help someone else if the initial problem happens to occur.  Of course reading the instructions might also be good advice.

Larry

Where do you have the "U" connection from the Command base attached?  The Command base must be powered up  before or at the same time as the layout.... Not after layout is powered up. Anyway you got 'er fixed.. good stuff.