Abstract
The controlling objects of PLC were simulated by configuration software, and the virtual PLC Laboratory based web environment was built using the web publishing capabilities of configuration software. In this article, Taking Zijin Bridge configuration software as a platform, a Siemens s7-200 PLC as a control device, verifies the feasibility of virtual PLC laboratory construction based on Web access. The designed thoughts, network, function construction and designed procession were described in detail. This system provides a virtual environment similar to the actual experiment for students. In this experiment, students can operate remotely the designed experiment, and the experimental data and results can be observed at the same time. Students can learn experimental project purpose, principles and related information by system help. Teachers can monitor and evaluate experiment results. This scheme solves the difficulties of the PLC traditional experimental methods. The system is low cost, maintenance-free, flexible, strong commonality and high security etc.
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