Implementation of ON/OFF and PID controller using TCP Protocol Based on Virtual Instrumentation

Abstract

LabVIEW (Laboratory Virtual Instrument Engineering Workbench) is the software which gives virtual existence of hardware, reduces its cost and hence termed as Virtual Instrumentation. This paper deals with the implementation of ON/OFF and PID controller for controlling the temperature of a heating element inside a wooden box with the help of LabVIEW. In this software, Transmission Control Protocol (TCP) is used for developing an online transmission process between client and server. Client has control over the set point and Server has control over the temperature. In hardware section, a Data Acquisition (DAQ) card reads temperature from sensor and delivers to Server. With the help of internet protocol, client provides the value of set point according to which the control actions are taken by the server. The paper also includes discussions regarding the advantages and disadvantages of TCP/IP.