What specific (PLC, sensor, power meter) you are trying to read? Share public link
To obtain a , you must purchase a license through the official website, as it is commercial software and not free. Once purchased, the key is sent manually via email and entered into the program's demo screen to unlock full features. Licensing Options simply modbus master license key
Officially, the license is . However, the developer is known to be reasonable. If you retire an old PC and move to a new one, you can: What specific (PLC, sensor, power meter) you are