The DTM30 has three operating modes. Modes can be changed by DCC switch numbers, or by pushbutton presses.

  • In Normal mode, the DTM30 controls point directly, as normal
  • In Slave mode, the DTM30 displays points but its pushbuttons generate sensor messages. These are interpreted by the PC program, so that the PC program is in charge. This mode is not widely used, but available is you wish.
  • In Interlock mode, the DTM30 LEDs display points as normal. The pushbuttons will control points directly, but only when allowed to by an interlock. The interlock is a special kind of cell that determines with traincontroller whether manual control of point swould be safe.

This is achieved by splitting the track into up to 4 zones per DTM30, and through an Interlock per zone. The Interlock asks the PC software it is safe for local point operation - and if it is, the PC software reserves track for manual control to prevent it automatically driving trains through. If not, the local pushbuttons for points don't work and "beep" instead - simple!