Low cost Wireless I/Os using PLC, HMI & ZIGBEE
D uring the past decade, the industrial sector throughout the world has shifted from the classical methods of Control and Automation to the state of the art techniques. This allowed the industries to attain a higher pe rcentage of growth and production, which consequently gave rise to reduction in costs of the products. This trend of automation is gaining popularity at a very slow pace due to huge initial costs associated with it. This problem can be addressed by promoti ng Wireless I/O‟s interfaced to Programmable Logic Controllers using Zigbee , which might encourage the industries to take the path of modern automation.