The pp port works. I can pulse the pins and they change.
NOW YOU SAY
Nothing is going to happen until I get the pp working.
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IF WORKING:
So what is the voltage swing for pins 2,3,4,5,6 at the computers PP?
You may find that they are different but just list the high and low,please.
Then please confirm , via your drive manual the min pulse required and also the min volatge required.
Some other settings you need to change or try are in the pic.
RICH