Has anyone here ever programmed a plc?

Originally Posted by dtebbe

I always wanted to try using one for automation in Radio & Television, but never could really find one that had an accurate real time clock that could be referenced in the program. In broadcast you need to reference the clock quite a bit for "hard breaks", but most of the time you need just the type of functions that a PLC provides. Timing is critical on the hard breaks, however, you have to be within .1 - .5 of a second at the network level, which pretty much required a GPS-locked clock.

DT

You can access a real time clock in the AB PLC's. Use the status words. The only shortcoming is that you have to write your own code for DST.