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Simulating Dynamic Braking On A Digitrax System

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  • Member since
    September 2013
  • 2,505 posts
Posted by caldreamer on Wednesday, October 19, 2022 6:28 PM

Which CV's would you set to simulate dynamic braking? I would like to press a function key for example F7, and have the correct CV's act like dynamic brakes and slow the train.

  • Member since
    July 2009
  • From: lavale, md
  • 4,678 posts
Posted by gregc on Wednesday, October 19, 2022 6:00 PM

Digitrax Turning on Back EMF describes the use of CVs 55, 56 & 57.   they don't seem related to dynamic braking

greg - Philadelphia & Reading / Reading

  • Member since
    September 2013
  • 2,505 posts
Posted by caldreamer on Wednesday, October 19, 2022 5:19 PM

Yes, indicated the system not the decoders. Am I correct that CV's 55,56 and 57 are the ones that I need to configure?

  • Member since
    February 2005
  • From: Vancouver Island, BC
  • 23,330 posts
Posted by selector on Wednesday, October 19, 2022 3:08 PM

Many decoders have settings for grade compensation.  The manual will describe the CVs and suggest how to manipulate them for a given effect in motion.  But as was already stated above by wjstix, this isn't a function of the operating system, only a characteristic/configuration of the decoder installed.

  • Member since
    February 2002
  • From: Mpls/St.Paul
  • 13,892 posts
Posted by wjstix on Wednesday, October 19, 2022 1:32 PM

It really has nothing to do with the system you're using for DCC, it's the decoder in the engine. Some just create the sound of the dynamic brakes but don't change the engine's handling, some make the dynamic brake sound and reduce the diesel engine rumble to 'idle' sound. Some will reduce the engine's speed a set amount when the dynamic brake sound is engaged. You'd have to look at the manual for the decoder in the engine to see what is available and how to adjust the CVs to get what you want it to do. 

Stix
  • Member since
    September 2013
  • 2,505 posts
Simulating Dynamic Braking On A Digitrax System
Posted by caldreamer on Wednesday, October 19, 2022 11:23 AM

The ABTH (Air Brake & Train Handling Rules) tell engineers when and how to use dynamic brakes.  I would like to know how to set this up on my Super Chief system.  Which CV's do you use on the decoder and which function key would you use to simulate the use of dynamic brakes.

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