Available for larger engineering teams or departments. Conclusion
To use Modbus Poll to communicate with a device (Slave/Server): Connection Setup Connection . Choose your protocol: Modbus TCP/IP modbus+poll+key+full
If you decide to purchase the official license: Available for larger engineering teams or departments
Given these interpretations, some good features for a Modbus-related product or tool with "poll", "key", and "full" could be: modbus+poll+key+full
Engineers use the full version to solve complex communication "stories" in the field: Witte Software ordering information - Modbus Tools