The difference between Modbus protocol and private protocol

The Modbus protocol is an open industrial communication standard widely used in the field of industrial automation, characterized by simplicity, efficiency, and strong compatibility. It supports multi device interconnection and cross platform communication. Private protocols are closed protocols customized by manufacturers or systems, which only authorize devices to use and have high security, but poor compatibility, usually limited to specific devices or systems. The core difference between the two lies in their openness and application scenarios: Modbus is suitable for a wide range of industrial device interconnection, while private protocols are often used for specific security requirements or internal system optimization.