01-06-2014 10:20 AM
I am interfacing an NI-9501 direct-drive stepper module (within a cRIO-9073) chassis. I hacked the example project found in the getting started guide to try and match my system (attached). I got through the FPGA compile okay, and when I go to the interactive test panel for my 9501 axis, it returns the softmotion error 3120 (undervoltage), and the led status light on the 9501 goes to red. I got out the Fluke and verified that all supply voltages are set at 24VDC, IAW with the operating instructions. I'm stumped - I suspect there is something wrong with the FPGA VI that's monitoring the module, but am not savvy enough on FPGA coding to know where to begin. Any thoughts?
01-07-2014 03:43 PM
Hi there,
The most common cause of this fault is the voltage supply connected to the 9501 itself. Can you confirm that a compatible power supply is connected to pins 7 (COM) and 8 (Vsup) of the 9501?
Cheers,
Andy C.
Applications Engineer
National Instruments
01-07-2014 03:44 PM
yes - the Fluke reads 24V supplied to the 9501, IAW with the OI manual
01-07-2014 03:52 PM
ok - I just checked again.....and the neutral was connected to Pin9, not the COM on Pin 7......looks like it pays to read the wiring diagram!