GE PRG-MODEM 电压监视卡件

Voltage monitoring card of GE PRG-MODEM

GE PRG-MODEM voltage monitoring cards are used when timers (ONDTR, TMR, and OFDTR) are used for blocks that are not invoked every scan. Timers accumulate time between calls to subblocks unless they are reset.

This means that they function similarly to a timer running in a program scanning slower than a timer in the main program block. For programs where blocks are inactive for long periods of time, the timer should be programmed in such a way to account for the catch-up feature. Related to this is the use of the JUMP instruction. A timer that is skipped will not be able to catch up and therefore will not perform every scan in the same way.

 

Voltage monitoring card of GE PRG-MODEM