rmonroe
Guest
R
We are experiencing electrical interferences with a Mitsubishi VFD. When the drive runs we get outputs from our PLC going high. Checking from the neutral terminal I see 60VAC TO 90VAC directly off the output module of the PLC. Note; The output modules are relay output at 120 VAC.
This application is a retrofit to an existing piece of production equipment. On this particular system we replaced the combination contactors (Forward/Reverse) with a VFD for a 1 HP motor. This system is a 3 Phase 480 Volt with 120 controls for the PLC devices. We did not us any type of motor shielding or control shielding. I also notice that the motor leads are running in the same conduit as my control I/O wires…could I please get some feedback.
Thanks,
This application is a retrofit to an existing piece of production equipment. On this particular system we replaced the combination contactors (Forward/Reverse) with a VFD for a 1 HP motor. This system is a 3 Phase 480 Volt with 120 controls for the PLC devices. We did not us any type of motor shielding or control shielding. I also notice that the motor leads are running in the same conduit as my control I/O wires…could I please get some feedback.
Thanks,