How to decrease counter ?

Hi, and sorry for a newbie question written in bad English...
how can i control the count direction (up/down)of a counter by a DIO?
In my appliance a counter counts the low-high edges of a step frequency signal. (stepper: escap, DAQ: 6024E)
So when DIO is high (rotation direction right) the counter counts upwards, and when low (direction left) it counts downwards.
How to do it?
Thanks
Dietmar

Dietmar,
Assuming you want to setup the encoder all in HW,
For CTR0, connect UP/DN to DIO6.
For CTR1, connect UP/DN to DIO7.
You can also reference this very detailed application note on using encoders with DAQ STC(the digital chip on our E-Series boards)
http://zone.ni.com/devzone/conceptd.nsf/webmain/6F25CBA2CD73417786256869005E5FC3?opendocument&node=DZ52326_US
This should do it for you.
Kevin R

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