I have "blocks" that are controlled by an Atlas Selectors. I simply: The power is turned ON everywhere for the TIU at the initial start-up so that the TIU can "recognize" all DCS command engines. I then "kill" the power to each DCS engine on a particular track(s) via specific Atlas Selector toggle switch. When I re-power later, the DCS engine automatically starts up after first contact with power. I shut the engine down via remote ("6") and restart (#3). I'm at the beginning. Easy.
I started doing this because I'm tired of occasionally an engine will start itself and crash into the turntable (or worse) and I won't realize it happened until how much later? One time I found an engine spinning its wheels against the outside of the turntable bridge--NOT GOOD. Turning the power off to tracks DCS engines occupy after initial start-up PROTECTS from unwanted start-ups and worse--derailments. Works like a charm!
