Implementation programmable logic controller for THAILAND industries

This paper presents a design of Programmable logic Controllers that can be used in manufacturing automation and process control systems. Most of controllers have been import from oversea. This research focuses on PLC local development by KMITL. The PLC system consists of CPU unit, Digital I/O RTU unit and Analog RTU unit. The experimental model is used to measure PLC scan time. The result can let us know controller performance to be applied in appropriate scale of plant in the manufacturing automation. In this article, there are many benefits to industries especially to support SME that can use local technology. © 2005 IEEE.