.. we are opening the source code.
It was some kind of the weekend project, but it’s real, up and running now. The MODBUS/TCP client library (which has been included in IQarium) is available on GutHub. You are free to download it and use it as you wish.
Link to the git repository: https://github.com/kleniu/MODBUSLIB.git
For your convenience I made a simple CLI wrapper to communicate with the PLC using command line. Just download compiled java archive (mbcli.jar) from https://github.com/kleniu/MODBUSLIB/blob/master/mbcli.jar and use your favourite java runtime to set/read modbus coils or registers from command line.
To run the app and display the usage help message just do:
java -jar mbcli.jar -h
have fun …
p.s. with FATEK plc works great