This webinar explains how Modbus serial port sharing devices enable two Modbus master systems to access the same Modbus RTU slave network without communication conflicts. The training covers key functions such as two-masters/one-slave sharing, baud rate conversion, Modbus RTU ↔ ASCII conversion, and the built-in read cache feature that speeds up response time by returning repeated data requests without re-polling the slave bus. It also reviews common application examples—including building lighting control and production line automation—and concludes with a live demonstration showing a Touch Screen PLC (HMIWorks project) and a PC-based SCADA system (InduSoft) operating as two separate Modbus masters that simultaneously read and display register data from shared Modbus RTU devices through the serial port sharing module.
