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Tsunami TSU-PNP

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  • Member since
    December 2007
  • From: Millarville, Alberta. Canada
  • 151 posts
Tsunami TSU-PNP
Posted by CPbuff on Sunday, December 6, 2020 2:27 PM

Recently installed Tsu pnp and I want to disable autostart! I believe CV 114 is the CV and as a default it is set to 32 (being in bit location 5) , do I set CV 114 to 0 to turn it off ? I'm getting conflicking info between the tsunami users manual and the diesel technical guide!

Also I want to turn on the number board lights which I have hooked up to terminal FX4 on the board but found I need a 3.3K ohm resistor instead of the 1K ohm resistor as required for the rest of the lights! What CV ? to what setting?

  • Member since
    May 2014
  • From: Pennsylvania
  • 847 posts
Posted by Trainman440 on Saturday, January 16, 2021 6:46 PM

Hi, why not just try setting CV 114 to various CVs until one works? Just write down the default setting to revert back to if the desired output isnt preferred.

 As far as resistors go, I dont believe Tsunami decoders have a CV to program to change resistance(or voltage output). You'll just have to swap out the resistor for another one. 

3.3k ohm is very high for an LED light bulb. Technically, you only need 470 ohms for an LED. Unless you find it too bright, there's little reason a 1k shouldnt work fine. 

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Modeling the Santa Fe & Pennsylvania in HO

Youtube Channel: https://www.youtube.com/channel/UCLb3FRqukolAtnD1khrb6lQ

  • Member since
    February 2002
  • From: Reading, PA
  • 29,842 posts
Posted by rrinker on Saturday, January 16, 2021 8:36 PM

Bit 5 is a value of 32. What is the value currently in CV114? Put that value in Windows Calculator set to Programmer mode and look at the bionary. If Bit 5 (the 6th one fromt he right) is a 1, then subtract 32 from the current value to turn the option off. If Bit 5 is a 0, add 32 to the current value to get the new value for CV114 to turn it on. This is how yuou change just Bit 5 without adjusting any other setting.

                                    --Randy

 


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

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