Abstract: PLC is a controller used to automate the industrial process and monitor itself. Programmable logic controller is used in many industries to control the whole process automatically with less human intervention and to avoid errors. With the rapid growth in technology wireless instrumentation has came into existence to avoid cabling infrastructure and to obtain efficient control. In order to have a wireless control the existing plcs have to be replaced with wireless plcs. PLCs are also used in homes and small scale industries to automate small process applications. So it is undesirable to invest on wireless PLCs which are expensive for home based applications. In this paper we present a novel approach of converting the existing wired plc into wireless plc by configuring XBEE in direct mode using X-CTU software as communication interface between plc and process, the process used here is batch process and controlled through SCADA.