The Hardware in Loop Simulation System Design Based on PLC for the Process Control

This paper designs a hardware-in-the-loop simulation system based on programmable logic controller (PLC) andMATLAB. The hardware part of the system is composed of analog input and output module, PLC and computer. The analog input and output module can convert digital-analog signal, PLC can set system control parameter, and computer can establish the controlled object model and detect real-time system running state. The modular-designed simulation platform can improve its flexibility and operability by adjusting the network and operation parameters according to experimental needs.