Encoder reset and events on encoder position

Hello,

 I have a 1734-VHSC24 fast entry card.

 An ifm rup 500 encoder.

 I want to reset my encoder counter on a rising edge of a sensor.

 The problem is that on a rising edge it doesn't reset my counter, I feel like I need to maintain my pulse for at least 50ms.

 I also want to trigger events on an encoder position, what is the best way?

 I am using a comparator, but I don't think this is the best way to go.