ACS550 with PM554
I want to communicate three ACS550 Drive simultaneously with PM554 PLC, i need to control drive for START/STOP, FWD/REW & Frequency command from PLC/HMI.
I had gone through ACS550 drive manual but im not getting it. so can you tell me what are the parameters to set in Drive and in PLC.
Note: i can read the data from the drive but cannot give command and communiaction protocol i use is RS485 modbus.
1.Make a VFD Modbus programming.
2.using Modscan sw ,Read the parameters like speed,current and wirte the parameter CW,Ref command.This step ensure your VFD program is ready.
3.Make sure your wiring +ve and -ve connection bw PLC and VFD.
4.In plc program COM_MOD_MAST block, Check your function code FCT must be a 16 for write n words through Modbus.
5.addr is 0, NB is 2, In ADR block give %mw0.0
6.so %mw0.0 is a control word.
7.%mw0.1 is a ref word