Upgrade Wired PLC to Wireless PLC

� While working on awired process the cabling is more laborious task. Very much cost associated with hard wiring instrumentation process. Cabling takes time for installation and if there is need to add extra inputs and outputs to process then it is very tedious task. These processes can be controlled using wireless PLC but it is very costly.This paperpresent revolutionary idea which not only overcome all this problems but also adds some benefits to system. Before solving the problems of cabling it is essential to understand the use of wires in process automation.Wires are used to transmit the electrical signals from field to control room. In this system wiresare replaced with wireless radio modules to transmit the data from field to PLC and viceversa. For this two radio modules are used, one is at field and another is at controller side. Field area radio modules take data from sensors and actuators and transmit wirelessly to the PLC. Radio module interfaced to PLC collects this data and changes the status of PLC inputs. PLC process this data and generates the output according to program feed in it. This data again transmit back to field radio module which actuate the actuators in field area.