Interrupts in S7-1200

[Rushome]

Hi

I'm using a HSC interrupt so that when the counter reference value is reached my interrupt block runs and sets an output then writes a new reference value to the high speed counter, when the new value is reached it runs again and switches the output off and resets my reference value to start the cycle again. My question is can I reliably use a timer in this interrupt OB. I'm not sure if I can as the block only runs once everyone the RV is reached.

Any info would be appreciated.

 

[mk42]

You are correct, you shouldn't use a timer in that OB. It runs once every time the correct value is reached.

What you should do is set a bit which triggers a timer running in your normal code (Main Program OB).