unsaint32
Member
We use Powerflex 70 for a 3phase 480V motor that pulls a coil off a coil reel. A vertical laser (Allen Bradley 45cpd analog laser sensor) measures the coil slack to adjust the pull speed.
We have been getting fault #24 (decel inhibit) every night. I changed the deceleartion from 2 seconds to 3 and that did not solve the problem. DC bus voltage was going between 650 & 740Volt just before the faults.
However, when we unplugged and replugged the cable plug to the AB laser, that solved the problem (for tonight anyway). Now, the DC bus is steady at 640V.
Any ideas? Can erratic speed input change (due to the AB laser not working right) could raise the DC bus voltage? What parameters should I look? Thanks.
We have been getting fault #24 (decel inhibit) every night. I changed the deceleartion from 2 seconds to 3 and that did not solve the problem. DC bus voltage was going between 650 & 740Volt just before the faults.
However, when we unplugged and replugged the cable plug to the AB laser, that solved the problem (for tonight anyway). Now, the DC bus is steady at 640V.
Any ideas? Can erratic speed input change (due to the AB laser not working right) could raise the DC bus voltage? What parameters should I look? Thanks.