Import-User-1

Maciano

How will the PLC react to multiple CALLS of OB40?

1-· If the event occurs on the channel that previously triggered the hardware interrupt, then the new interrupt is lost. This is illustrated in the following figure based on the example of a channel of a digital input module. The triggering event is the rising edge. The hardware interrupt OB is OB40.

2-If the event occurs on another channel of the same module, then no hardware interrupt can currently be triggered. This interrupt, however, is not lost, but is triggered after the acknowledgement of the currently active hardware interrupt.