So step by step :
start SW:
then options and Modbus TCP Settings:
Set IP address of your EVCS, port 502
Then icon connect - must be connected
If you want read, you will set read holding registers, address 5101 and click icon read/write:
If you want change it, then set write single register, address 5101 and click on the value and change it to the 1. Last click on the read/write icon.
DONE
