dginbuffalo
Member
Hello everbody. Trying to hook up a 525 VFD in 2 wire run, 4-20mA speed and a pot that runs the drive in hand mode. For hand mode, there is a switch that is powering terminal 6 of the drive. Basically, it set to run with the 4-20mA signal all the time, unless terminal 6 is energized and then the POT becomes the speed reference.
Now here's the weird part. Drive runs fine in the 4-20mA mode. If I connect the POT wires while the drive is running in 4-20mA mode, and then twist the POT, it varies the drive from where it is up to 60Hz. It's acting like both signals are affecting the speed?? Anybody ever see any weirdness like that before? I checked the wiring and it's per the manual. I "believe" I have all the parameters set right. I think T766 is set to 1 which designates term 6 to use the 2 wire run and then P049 to 5 which designates 0-10vdc POT reference. Kind of bizarre but as always, could be something dumb!
Now here's the weird part. Drive runs fine in the 4-20mA mode. If I connect the POT wires while the drive is running in 4-20mA mode, and then twist the POT, it varies the drive from where it is up to 60Hz. It's acting like both signals are affecting the speed?? Anybody ever see any weirdness like that before? I checked the wiring and it's per the manual. I "believe" I have all the parameters set right. I think T766 is set to 1 which designates term 6 to use the 2 wire run and then P049 to 5 which designates 0-10vdc POT reference. Kind of bizarre but as always, could be something dumb!