Abstract: YL-158GA1, developed by Zhejiang Yalong Intelligent Equipment Co. , Ltd. , is a high-cost-performance and powerful modern electrical control training equipment. It also serves as the competitionequipment for the National Vocational College Skills Competition, making it an important device for cur-riculum reform in equipment manufacturing majorsof higher vocational colleges. YL-158GAl can option-ally adopt Siemens S7-1500/1200 series PLCs to form a multi-level network control system via industrialEthernet, so as to meet the requirements of teaching and practical training. This article studies and dis-cusses the construction of a network system; real-time Ethemet is used to realize control functions for asingle device; multiple devices are connected via Ethernet and S7 protocol to achieve workshop-levelcommunication and parameter transmission; and IRT redundant communication between multiple devicesis achievedthrough MRPD protocol. This provides a technical foundation for giving full play to the roleofequipment in professional curriculum construction.

Key words:  , modern electrical control systems, training network, automatic control