Atlas"O" C630 EOB to ERR CC Issue

Did you program in a feature code while in program mode? Should be Aux1 5, 6, or 8.

Pete

Pete; It's been too long since I last worked on this project; I'll give it a try and report back.

Larry

Simple fix, the lighting outputs in command mode for TMCC are negative in respect to frame ground.  You have to swap the polarity of the lighting so that ground is positive and the headlights will work.  I have no idea how they were wired with the EOB which also uses the R2LC, but it's clear they're reverse polarity now based on your description.

John: Thanks for the input, I'll give that a try next. Since my last post, I tried the "feature" re-programming trick per Pete's suggestion and that did not resolve the issue.

Next, I talked with Ken at Electric Railroad, and we both came to the same conclusion of trying another R2LC/R4LC module. I just concluded that and it did not resolve the issue either. So I am off to reverse the polarity John and hope for success.

At the very least I'm A-#1 at de-cowling Atlas"O" diesels in record time.......

I think it's about 99.9% that swapping the lighting leads will solve the problem.   I've connected several LED's backwards over the years, and that is the exact symptoms.  The giveaway is they light in conventional and just flash in command.  The conventional lighting output is full-wave track power, the command lighting output is half-wave track power passing only the negative half of the AC waveform.

BTW, if you ever add LED's to a plain TMCC locomotive, one NOT using the Cruise Commander, AC Commander, or DC Commander, you will need a .01uf capacitor across the light outputs of the R2LC to force the triac to fire.  However, that's not your problem this time, just letting you know so you can avoid that issue in the future.

If the EOB used a Code 07 that is the issue.  Either way check you atlas LED polarity and make sure ground goes to the + of the LED.  Control from ERR is the negative of LED.  G

GGG posted:

If the EOB used a Code 07 that is the issue.  Either way check you atlas LED polarity and make sure ground goes to the + of the LED.  Control from ERR is the negative of LED.  G

 Since he took all the EOB stuff out and installed the ERR CC, it would be very easy to get the wiring backwards for the lighting, the TAS EOB just has a 2-pin connector for the light outputs.  This is not just an issue with the C07 R2LC, it could happen with any software version.  FWIW, with the C07, frame ground would NOT be the + side of the LED board.

GRJ: NAILED IT; once I swapped the lighting polarity, everything is calm in my railroad world. Thanks again for the information sharing here on the Forum John & GGG and others I've missed.

This is project #2 this week that have been resurrected out of the "dead' line and made operational again. The other was my Flyer SD70ACe with built-in electrical pickup design issues-only four years getting it to run as it should have from the importer.

Larry

gunrunnerjohn posted:

GGG posted:

If the EOB used a Code 07 that is the issue.  Either way check you atlas LED polarity and make sure ground goes to the + of the LED.  Control from ERR is the negative of LED.  G

 Since he took all the EOB stuff out and installed the ERR CC, it would be very easy to get the wiring backwards for the lighting, the TAS EOB just has a 2-pin connector for the light outputs.  This is not just an issue with the C07 R2LC, it could happen with any software version.  FWIW, with the C07, frame ground would NOT be the + side of the LED board.

I did not say it was.  But if a code 7 was used and he followed the red and black wiring of the LED to the ERR C08 it would cause them not to light.  My comment about polarity was for the C08.  G