Problems setting Inhibit Outputs with UMI

[EmZed]

I am using a 3rd party stepper drive with a PCI7334 and 7764 UMI. The Step, Dir and Enable inputs on the drive are opto isolated. I have tied the -ve terminal of each to Ground and the +ve terminal to +5V though a 390ohm resistor and to the corresponding connection on the UMI.
I setup the axes inhibit output in software to be Inverting, the switch on the UMI is set to Active Low inhibit outputs and the Drives are Active closed (need to have a potential difference across them to be enabled).
My third axis must be enabled the opposite way around. But when i set it up in software to be Non-inverting, it doesn't change on the UMI. why would this be so?
Can you have one axis with its inhibit output active low, and another axis with it
s inhibit output active high?

Also, Do i need to pull the inhibit outputs high?

Your help will be much appreciated.

[Jim Laudie]

To whom it may concern:

Yes, you can have one axis with its inhibit output active low and another axis set to active high. You need to go into MAX under the Device Settings and expand the tree entitled Axis Settings. With the corresponding axis selected in the tree, you can set the inhibit output to active high or low. If you don't expand the tree under Axis Settings then whatever you set the inhibit output polarity to will apply to all axes on the board. That might be part of your problem.

That inhibit output shouldn't need to be pulled high. That would be handled internally to the board.

Hopefully that is help to you. Best of luck with things.

Jim Laudie
Applications Engineer, National Instruments