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Conecting a FC51 Danfoss VFD Using MODBUS
Controlling a FC51 Danfoss VFD with a PLC to start, stop & jog the drives.

i would like to connect the delta PLC and HMI to the fc-51 vfd via modbus. i am unable to get the connection to the PLC via Modbus.

please suggest me the best solution of my problem.

and also tell me about the address of communication and frequency read write register.