Data Acquisition and Control of Multiple Stations Using HMI and NI USB-6212

This paper deals with the computer based realtime control of process stations using PI, PID & MRAC controllers. The specific problem is system identification for level and flow stations.The transfer function of the system is obtained from the openloop testing, and based on the parameters obtained the controllers are vdeveloped. By the closed loop method the PI, PID controllers parameters are also obtained and the simulation is carried out in MATLAB. The real time implementation is done by labViewwith the help of PC and DAQ card and both results are compared.The Model reference adaptive controller (MRAC) is also developed and implemented in realtime and the response is compared with conventional controllers PI & PID for the combined level & flow process.