Modbus RTU is a serial communication protocol used to connect industrial devices such as PLCs and sensors. It works with a master slave structure, where the master sends requests and the slaves respond. Data is transmitted in binary form over RS 232 or RS 485 lines, using predefined functions to read and write registers or coils.
Modbus RTU is popular because it is simple, reliable, and supported by many manufacturers, making it easy to integrate different devices into one network for real time monitoring and control.
