1, Kunlun touch screen communication port definition: Kunlun touch screen generally provides RS485 and Ethernet communication ports. Among them, RS485 communication port refers to the interface for data transmission using RS485 communication protocol, which is usually used to connect PLC, frequency converter and other equipment; Ethernet communication port refers to the interface supporting TCP/IP and UDP/IP protocols, which is mainly used for data exchange with computers or other network devices.
2. Definition of communication interface of Siemens PLC: Siemens PLC provides various communication interfaces, including PROFIBUS, MPI, PROFINET, Ethernet, etc. Among them, PROFIBUS communication port refers to the interface for data transmission using PROFIBUS protocol, which is usually used to connect I/O modules, frequency converters and other devices; MPI communication port refers to the interface used to connect the programmer and SIMATIC S7-300/400 series; PROFINET communication port refers to the field bus system based on Ethernet, which is used to realize data exchange and control of different devices in the automatic control system.