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How long does programming last with power off?

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  • Member since
    June 2007
  • 143 posts
How long does programming last with power off?
Posted by Maurice on Sunday, February 3, 2008 11:17 PM
If I understand it correctly, when I first put a DCC locomotive on my layout, I have to program it.Once it is programmed, is there an internal battery to retain the memory?
  • Member since
    February 2007
  • From: Christiana, TN
  • 1,652 posts
Posted by CSX Robert on Monday, February 4, 2008 6:11 AM
The memory that stores the programming is called flash memory.  It does not require a battery to maintain the memory and it should last forever with the power off.
  • Member since
    February 2002
  • From: Westchester NY
  • 1,744 posts
Posted by retsignalmtr on Monday, February 4, 2008 6:51 PM
i have three locos that have lost their 4 digit addresses and would not run until reset to factory the factory default settings with the magnetic wand then reprogramed with the cab number. they are 2 ho proto rs 27's and an atlas mp 15. this has happened while operating and also while on track but not selected to run. all three have sound. i have many locos in ho and n scales but it has only happened to the three with sound. it has also happened to members of my club but only with their sound equiped units. all of my other locos have kept their addresses for several years now.
  • Member since
    January 2001
  • From: Kansas
  • 808 posts
Posted by jamnest on Monday, February 4, 2008 7:14 PM

Sonetimes my decoders get "scrambled" and need to be reprogramed.  I just put them on the programing track; fire up Decoder Pro; call up the locomotive file and send the saved decoder information back to the decoder.

One of the many benefits of Decoder Pro, which can be downloaded free.  You must, however, have a DCC system that has a computer interface.

JIM

Jim, Modeling the Kansas City Southern Lines in HO scale.

  • Member since
    February 2006
  • From: SW Wisconsin
  • 157 posts
Posted by 60YOKID on Monday, February 4, 2008 8:30 PM
I've had decoders loose their memory on several ocassions.  It seems to happen more often after a derail or track short circuit episode.  My guess is it happens because of the electrical impulses that a short circuit can produce.  Some decoders are more suseptable to this than others, and dirty wheels might also be a factor.
  • Member since
    February 2005
  • From: Vancouver Island, BC
  • 21,819 posts
Posted by selector on Tuesday, February 5, 2008 11:24 AM
I have never had a decoder lose anything more than its chuff rate setting over the three years of model railoading.  None have lost their momentum/inertia, bell rate, whistle type, volumes for all of the sounds, or address.  The Tsunami decoders seem to need chuff rate tweaking, but not my QSI decoders.

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