NMRA Accessory Function One

Model Railroader Electronics and DCC
1

The manual for my MRC Command 2000 (c. 1997) says, “Command 2000 can control 10 decoders with NMRA accessory function one.” What kind of accessories would be included in that category? Specifically, is there any possibility that a sound decoder could be operated with this accessory control on the command station?

2

Light.

David B

3

Actually, the headlight is normally function 0. Most sound decoders use function 1 as the bell.

4

MRC 2000 predates sound decoders, and their decoder used 0 as front light and 1 as rear IIRC.

But, as you have stated above, with modern decoders, 1 is the Bell (if so equipped).

David B

5

Does that mean that a loco with a modern sound decoder with bell included would respond on the MRC 2000? If so, could a whistle or horn address be reprogramed to one and work on the system?

Mike

6

Do you have an MRC 2000 or looking to purchase one?

Either way, I suggest moving on to an NCE Power-cab or equivilant. Modern decoders have moved WAY beyond the MRC 2000.

David B

7

Yes

Yes, but you would have to use a system other than a MRC Command 2000 to program it and the decoder would have to support function remapping. As an example, I have an N-scale Athearn Challenger and an MRC Command 2000(in addition to my Digitrax Zephyr). The Challenger does work fine with the Command 2000, and I can control the bell, but I can not control any other sounds with it and the Challenger does not support function remapping, so it can not be programmed to where the Command 2000 will control any other sounds.

8

I’ve had a MRC 2000 for about 10 years, but had never thought about the accessory function possibly having a sound use. I’ve been trying to decide on a new DCC system, but I make-do with what I have (minus sound of course) so the costs associated with a new system, including conversion some custom painted and brass DC locos looks pretty substantial. One day I’m ready to go and the next I put it on hold.

Thanks for the feed-back.

Mike

9

Well, if you go with a Digitrax system, you can still run your DC locomotives. No one says that you have to jump in with both feet…you can absolutely just dip your toe in first.

David B