Joining & Separating trains from DTM30 pushbuttons

Some of the train operations at the stations require a manual "join" or "separate" train set operation. The obvious way to initiate that is with a control panel pushbutton.

The way to do it is as follows:

1. Add a pushbutton to the DTM30 that generates a LocoNet sensor message.
2. In Traincontroller, add a contact indicator to a switchboard attached to that sensor.
3. Add an accessory pushbutton to the switchboard.
4. Set the operations of the contact indicator when lit to activate the pushbutton, and when not lit to deactivate the pushbutton.
5. Edit the accessory pushbutton. At the top of the "operations" tab is a place to associate the pushbutton to a block; choose the right block.
6. Add an operation to the pushbutton when activated to execute a train operation "join locomotive" or "separate locomotive".