ABB ACS550 VFD

ABB ACS550 family stock photo

Overview

VFD made by ABB, has an option for encoder feedback for closed loop spindle speed.

Software

Page 3 shows the pin mapping from the DB9 to the RJ45.

Page 11 mentions DriveWindow Light 2

DriveWindow Light 2.95 (update?) installer

Modbus Control

mbpoll

There is an open source utility that can speak Modbus over a serial port (or USB to serial) that has an RS-485 adapter attached. It's called mbpoll:

https://github.com/epsilonrt/mbpoll

mbpoll commands to interact with the VFD:

# monitor output frequency (displays Hz * 10)
./mbpoll /dev/ttyUSB0 -b 9600 -s 1 -P none -a 1 -r 103 -t 4

# monitor output current (displays A * 10)
./mbpoll /dev/ttyUSB0 -b 9600 -s 1 -P none -a 1 -r 104 -t 4

# monitor output power (displays kW * 10)
./mbpoll /dev/ttyUSB0 -b 9600 -s 1 -P none -a 1 -r 106 -t 4

# monitor output voltage (displays V)
./mbpoll /dev/ttyUSB0 -b 9600 -s 1 -P none -a 1 -r 109 -t 4