Controls_SLuG
Member
We are an OEM of reinforcing fiber dispensing machines for asphalt production.
I am experiencing an intermittent issue with several machines where the PowerFlex 525 VFD keeps running after Stop is true and Start is false. During these random occurrences, the Speed Reference and Commanded Speed drop to zero, but the Speed Feedback goes up to approximately 32 HZ and the motor continues to spin until it faults with a F006 Motor Stalled fault.
We use a 480VAC, 3-phase, 0.4KW PowerFlex 525 drive (A-B 25B-D1P4N104) using FW ver. 7.001.
Our PLC's are A-B Micro850 (A-B 2080-LC50-24QBB). We use Ethernet/IP for speed and Start/Stop commands. Parameters P046 (Start Source 1) is set to 5 (Ethernet/IP) and P047 is 15 (Ethernet/IP). The PLC is programmed using CCW and I am using the RA defined UDFB for control of the PF525.
Most of the time these machines work as designed, with the drive stopping when the Stop instruction is enabled. Occasionally the drive will keep the motor running until the fault occurs. If this occurs on one of our machines when it is filled with our fiber product, a catastrophic machine failure will occur.
Has anyone else seen this issue or have any suggestions to eliminate this problem?
I am experiencing an intermittent issue with several machines where the PowerFlex 525 VFD keeps running after Stop is true and Start is false. During these random occurrences, the Speed Reference and Commanded Speed drop to zero, but the Speed Feedback goes up to approximately 32 HZ and the motor continues to spin until it faults with a F006 Motor Stalled fault.
We use a 480VAC, 3-phase, 0.4KW PowerFlex 525 drive (A-B 25B-D1P4N104) using FW ver. 7.001.
Our PLC's are A-B Micro850 (A-B 2080-LC50-24QBB). We use Ethernet/IP for speed and Start/Stop commands. Parameters P046 (Start Source 1) is set to 5 (Ethernet/IP) and P047 is 15 (Ethernet/IP). The PLC is programmed using CCW and I am using the RA defined UDFB for control of the PF525.
Most of the time these machines work as designed, with the drive stopping when the Stop instruction is enabled. Occasionally the drive will keep the motor running until the fault occurs. If this occurs on one of our machines when it is filled with our fiber product, a catastrophic machine failure will occur.
Has anyone else seen this issue or have any suggestions to eliminate this problem?