1、Modbus
Modbus is a widely used serial communication protocol, which allows communication between PLC, HMI and sensors. It is simple and multifunctional, and it is a common choice for industrial applications.
2、PROFINET
PROFINET is an industrial communication protocol based on Ethernet, which is mainly used in manufacturing and automation fields. It provides real-time communication and is compatible with standard Ethernet.
3. Ethernet /IP
This protocol is another industrial communication standard based on Ethernet, which is often used in manufacturing and process control industries. It is an open protocol developed by Rockwell Automation Company.
4. Equipment Network
DeviceNet is a protocol based on CAN, which is used to connect industrial equipment in automation applications. It is famous for its ease of use and robustness.
5、CANopen
CANopen is a communication protocol based on CAN bus. It is used in various industries, including automobiles, health care and manufacturing.