ModelRailroadForums.com is a free Model Railroad Discussion Forum and photo gallery. We cover all scales and sizes of model railroads. Online since 2002, it's one of the oldest and largest model railroad forums on the web. Whether you're a master model railroader or just getting started, you'll find something of interest here.
One of my locos is number 777. I can't assign a long address to it in DCC. When I do, DCC ignores it and still recognizes it as 3. So I had to go to a short address of 77. Can a 3 digit loco number be given a long address? And yes I set the long address value to 1.
First, an extended or long address is any address above the number 127. Once you have programmed it into your decoder, you must do two things. These are the steps:
First, set your programming mode to Paged or Broadcast. Enter your new long address. Then, you must power down....remove power to the rails. People overlook this step often.
Power up again, enter Ops Mode or Programming on the Main and set CV29 to a value of either 34 or 38. 34 is for a decoder that you will never expose to DC current, not even as a visitor on a club layout. If you set CV29 with a value of 38, the decoder will still recognize and adapt to DC current when you expose it to that type of current. Most of us use the value 34 because some decoders set on 38 will occasionally run away at full speed upon powering up the rails due to inrush of current they perceive as DC current at full bore.
Your system may not like the 0 (zero). I believe some systems balk at that configuration. I don't see why the extended address 777 shouldn't take if you set it properly....input in Paged Mode, power down the rails, power them again, enter Ops Mode and set CV29 to 34.
Thanks Crandell. Glad I read that about 34 and 38 'cause I may have reason to operate on either. I've noticed a couple of posters recommend disabling the DC option as a matter of course, is this the reason? (suddenly taking off when used on a DCC layout)
Glad I read that about 34 and 38 'cause I may have reason to operate on either. I've noticed a couple of posters recommend disabling the DC option as a matter of course, is this the reason? (suddenly taking off when used on a DCC layout)
That is one reason. Another reason is that the decoder then does not have to constantly be checking for that DC condition. It will then generally be able to respond quicker to straight DCC commands.
I have several locomotives with 3 digit addresses, and don't have a problem. I have programmed them with both a Digitrax and an NCE system.
One thing you may want to try is to hit "select loco", then enter "0777", and enter.
