Modbus communication failure in ACS 880 vfd
Hi Gents,
In standstill condition communication (Mod bus) are healthy. when we start the VFD after some time communication loss and error is move from one drive to on other drive (7 VFD are connected).
1- Parameter 58 should be enable or None?
2- On RTU module Network LED (Green blinking and some time orange and again Green).
3- EMF effect on Modbus cables ?
Please let me advice :
Best Regards,
Imran Javed.
In standstill condition communication (Mod bus) are healthy. when we start the VFD after some time communication loss and error is move from one drive to on other drive (7 VFD are connected).
1- Parameter 58 should be enable or None?
2- On RTU module Network LED (Green blinking and some time orange and again Green).
3- EMF effect on Modbus cables ?
Please let me advice :
Best Regards,
Imran Javed.
Asked 1 month ago
Voted best answer
1
may be it is EMF effect, In PLC side put 120 ohm resistance between D+ & D-
Answered 1 month ago
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