How to setting up ABBCS550 for communication by modbus and RS485 ?
to activate the EFB ModBus in ACS550 you need to follow the FW manual instruction. Other group to program:
group 10 for the activation start - stop
group 11 for the speed reference
group 16 for reset and run enable
FW manual instruction, available on:
Hope this help you
Source: ACS550 FW MANUAL