ModbusRTU is a commonly used serial communication protocol that is widely used for data communication between devices in the field of industrial control. This article will introduce in detail the meaning, working principle and application of ModbusRTU.
The ModbusRTU protocol is a type of Modbus communication protocol. It is a serial communication protocol developed by Modicon Corporation (now Schneider Electric) in the 1970s. ModbusRTU is usually used to connect industrial automation equipment, such as PLC (programmable logic controller), sensors, servo controllers, motor drivers, etc.
The ModbusRTU protocol works as follows: On the ModbusRTU bus, each device has a unique address. When communication starts, the master device (such as PLC) sends a start signal, and then sends the address of the device to communicate. Next, the master device and the communicated device perform data transmission through the serial communication line. During the data transmission process, the ModbusRTU protocol uses binary encoding, that is, the data is converted into hexadecimal numbers for transmission, and the communication rate can range from 1200bps to 115200bps. When the communication ends, the master device sends a stop signal.
ModbusRTU protocol has many advantages, such as flexibility, efficiency and scalability. It can connect multiple devices through serial communication and supports long-distance communication. In addition, the ModbusRTU protocol is simple, easy to use and low-cost, so it has been widely used in the field of industrial control.
ModbusRTU protocol is widely used for communication and control between various industrial automation equipment. For example, in industrial manufacturing, PLC communicates with sensors, actuators and other equipment through the ModbusRTU protocol to monitor and control the production process; in smart buildings, the ModbusRTU protocol can be used to control lighting, air conditioning, security and other equipment; in energy In management, ModbusRTU protocol can be used to monitor and control generators, energy storage equipment, etc.
In short, ModbusRTU is a commonly used serial communication protocol with the advantages of flexibility, efficiency, and scalability. It is widely used in communication and control between industrial automation equipment.