Hello, I am working with an inverter that only writes with a personalized command, soo I can't use system.opc.writeValues(). I'm trying to close the modbus device I have in the gateway and open the port with system.serial.openSerialPort(), and then sending the request with system.serial.writeBytes()…

You should try my alternate Modbus driver, which allows the use of scripted custom commands. [image] Automation Professionals' Advanced Modbus Driver 3rd Party Modules Automation Professionals is pleased to announce the first beta for its Advanced Modbus Driver…

Modbus RTU request with a custom write command

Ignition

pturmel May 19, 2026, 12:02pm 2

You should try my alternate Modbus driver, which allows the use of scripted custom commands.