RMweb Gold Chris007 Posted June 10, 2020 RMweb Gold Share Posted June 10, 2020 My Dapol 121 Railcar I fitted with their Imperium decoder, with my gaugemaster express I am able to switch one cab light on with F1 and the carnage light with F3, these two keys are displayed on the handset and stay on but when I press the F2 key the other cab light only comes on and then goes out when the key is depressed. Also F2 is only displayed on the hand set when the key is pressed. I have tried the F0 key but it has little effect. Could it be a fault with the handset. Link to comment Share on other sites More sharing options...
Nigelcliffe Posted June 10, 2020 Share Posted June 10, 2020 Its a limitation/ issue with your Gaugemaster system. With that F2 is non-latching (you have to hold it down all the time). This is because its a US designed system, and F2 is the "horn" sound key by convention. You can't change it on the Gaugemaster system. What you can change is the function mapping in the decoder to move the relevant lights from F2 to another key of choice. That requires some CV programming, not many, but to begin with decide which key you'd like the light to move to. Link to comment Share on other sites More sharing options...
RMweb Gold Chris007 Posted June 11, 2020 Author RMweb Gold Share Posted June 11, 2020 Thanks Nigel, I am a DCC beginner , how do I change the F2 key to say F4 for the relevant cab light ? Link to comment Share on other sites More sharing options...
Nigelcliffe Posted June 11, 2020 Share Posted June 11, 2020 Hmm, just looked at Dapol's manuals for the decoder. What a mess.. I've tried to interpret what they've written. I think if you set CV40=8 , it ought to put the Cab light on FunctionKey 4. Link to comment Share on other sites More sharing options...
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