How to make a Pulse pause logig using APL? I would like to turn the ventilation for 10min every hour.

In APL library 9.1+ (maybe even 9.0.x) the "TimeTrig" block (FB1802) can support this function by setting PerMode = 4 and setting the desired minutes after the hour to start the trigger and the other linking/operator inputs needed to make it continuous periodic operation.

Then if you have a timed duration, use that trigger to set a pulsed timer or whatever else you need for your motor start/stop logic.

Thank you for your replies.

What if I use PULSEGEN Block from CFC Library? Is it also ok?

By setting PER_TM to 1h10m and INV to 14%. I that case it would pulse 14% of 70min time, which is about 10 min. 

PULSEGEN could work but I would never have considered that.  It is typically used for PWM outputs to control from a PID that needs to control pulsed output instead of analog.  I think there may be some unexpected results with such a long period but it also could be fine.

I would prefer Oreca's solution of AFP over PULSEGEN.  Or using TimeTrig if you want control over exactly when the fan triggers each hour.  The real beauty is you can try and adjust based on the actual project requirements.

Also just pointing out that 70 minute cycle means your fan turns on 10 minutes later each hour.