Configuration of SC1 and DP8

[brianm]

Brian Morgan

[brianm]

Don't seem to see my message so here it is again

Have set up SC1 using the jumper as described in the manual. Using NCE powercab – the accessory activation is by select accessory/ enter number then the screen gives an alternative of 1 (on) 2 (off).
Have set CV 38 to 15 for each accessory numbers 1 to 8 (wasn’t sure whether this was needed just for first or for all eight)
Connected first signal yellow wires to outputs on the DP8 and the red and black wires to a 16v AC power source
a) Select accessory 1 on powercab and select 1 to operate – doesn’t work
b) Select accessory 1 again and select 2 – signal operates
Same occurs when trying to turn signal to stop
If you select 2 initially signal doesn’t operate, you always have to go thru’ the route described in a and b above
Question - does the set up procedure set CVs that the NCE powercab is not “seeing” or have I done something that is not correct

Brian

[Paul Harman]

Brian

There is only one CV38 in the decoder and you only have to set it once. CV38 sets the configuration for all of the outputs.

The initial operation might be ignored because the decoder retains the state of the signal. You will not see any operation if you try and set the signal to the same state that the decoder thinks it already is. If you have activated the signal with '1' then any further attempts to set the signal with '1' will be ignored until you have done a '2'

The initial setup procedure is very simple, you just set CV38 to 15, wire it all up and then set the address for the first signal using the jumper, making sure that the jumper is removed when you have finished. The addresses of the other seven signals is then set automatically to the next seven consecutive turnout addresses.

Paul

[speedstor49]

Hi Paul. Am I right in thinking that it is only possible to assign contiguous addresses to the outputs and not individually defined ones?

[Paul Harman]

That is correct

[speedstor49]

I also have an NCE Power Cab and have set the starting accessory number to 21.

I now have the following problem:-

With accessory number 21 selected, Port 2 responds to 1=N(ON) and Port 1 responds to 2=R(OFF) but only if the other signal has been changed first. e.g. Port 1 state has to be changed before port 2 will change and vice versa.

Something similar happens for accessory number 22. Port 4 responds to 1=N(ON) and Port 3 responds to 2=R(OFF) and so on with the other Accessory Numbers.

I have tried setting the start address with the PGM link on and also with it off, depending on which set of instructions I use.

I set CV38 to 15 after setting the start address.

I  buzzed through my "home made" Dapol Semaphore interface before I installed the chips and everything seems fine.

[Paul Harman]

Let me know the firmware version (CV112 and CV113) and the address settings (CV1, CV9 and CV29) in your SC1 and I will have a look to see what is happening.

[speedstor49]

SC1 settings on one of my two controllers are:-

CV1:- 25 (Is this because there is an offset of 4 for the NCE controller? I thought I had set it for 21.)
CV9:- 0
CV29:- 192
CV113:- 33 (Could not read CV112)

Unfortunately I cannot read the other controller although the chip can be read when plugged into the other circuit board. It then reads the same as the other. Andrew was very helpful in checking this for me and I now have a very useful SPROG.

Good news is that CV38 on the working unit was still set to 0 so I changed it to 15 and now it works fine.

[Paul Harman]

Excellent that you have sorted the problem.

CV113=33 is version 0.21 firmware

[speedstor49]

I had to return my faulty controller to the supplier to be exchanged. It turned out to be a problem with one of the transistors. The replacement controller is an Issue 2. It did not work with the Dapol Interface until I relalised that the Issue 2 connections are a mirror image of those on the Issue 1 controller that I had a problem with. Now that I have cross wired the connections, it works fine.

Thanks to Paul at CR Signals for a speedy replacement.

[Paul Harman]

You will find that the issue 2 board will be a lot more robust, unfortunately the transistor is a bit exposed on the old issue 1 boards and easily knocked. Excellent that Paul has sorted it for you.