Connected to SM 321 digital input?

What are the pulse encoders connecter to.
What is the minimum pulse width you want to cope with.
Which CPU do you have.
What processing do you want to perform.
Why is your post in red
How many beans make five
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L D[AR2 said:

What are the pulse encoders connecter to.
What is the minimum pulse width you want to cope with.
Which CPU do you have.
What processing do you want to perform.
Why is your post in red
How many beans make five
....
....

Click to expand...

A bit more info would be very helpful.
Anyways, wild guess here.
Since you are using a discrete digital input module, I assume you are using a Gray Code Parallel encoder.
You will need to convert Gray to Binary and manipulate as needed to get what you are shooting for.