PID control of air tank temperature system with parameters tuning through network

This paper presents an application of Networked Control in the air tank temperature system. The system is controlled by Proportion-Integration-Differential (PID) algorithm running in the Siemens S7-200 PLC. Through an OPC server component, controller parameters (proportion, integration, differential) can be remote tuning by Matlab. Thus, complex control algorithm such as fuzzy inference, expert system and genetic optimization can be utilized. The process is supervised by configuration software, for example King Views, located in different geographical areas at the same time.