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PWM switch after Trip zone condition disappears



Hi everybody!

Can somebody please explain why after the TZ6 condition disappears, the PWMs switch and only after that they return to the correct operation. I don't understand the purpose of trip zone then....

 When I halt the CPU, the PWM output goes in LOW as programmed (TZ6 - EMUSTOP), but when I hit Run again, instead of having the PWM in LOW (I have a delay of 5sec after the TZ6 condition disappears), I get a pulse of 50us. After that, the execution is correct, PWM in LOW for 5sec, then they are enabled and everything works as expected.

I use cycle-by-cycle tripping.

Many thanks,

Monica