Contact C tracks are agnostic to which train activates it. Does not matter if it is train A or train B, who pass through it. It will activate it every single time.

That is why you need to set it up in a smart way.

If train A passes through goes from contact 1 to contact 3 passing through contact 3. You must setup it up the macro of train A in such away that it ignores any activation of contact 3, as long as contact 1 or 2 are not activated (which means train A is there).

Then if you want to have macros for several trains you need to create umbrella macros that contains several macros, so they are executed sequentially (potentially by the use of contact tracks).

Last recomendation I can do to learn is watching the videos of https://youtube.com/@modeltrainfun?si=XpEM1pYGqvk1wEnA

The guy explains everything about programming with the CS3 very well.

Hi Kal

I think your problem comes from using a CS3 (or any normal digital central unit):
- it does not know which loco is where. In your case you have made a control using Loco A but as soon as you use another loco (B) it does not work anymore.
- so the only way to control trains with a CS3 is to use signals which cut the power off of any train in the location. A very Neandertalian way of controlling trains
- alternately, you need to use a train control software like Rocrail (RR). It updates in real time the position of any train and any wagon so, when a block is occupied then RR knows to which loco it needs to send a digital order (loco xyz V=0)

Here is a glimpse of Rocrail operation (totally automatic mode)

Cheers
Jean

Thanks all for your suggestions. Will try and see what works

Kal

Hi all,

Thanks for the suggestions. I mixed a few suggestions (except Rocorail) and able to run four industrial/freight tracks each controlling the other. Pretty basic stuff. My old analog mind is still grappling with macros and hope to decipher it one of these days

Cheers

Kal