Abstract

Programmable Logic Controllers(PLC`s) offer unprecedented capabilities for the acquisition and display of information to operators concerning the status of large motors in an industrial plant. Operator effectiveness in gathering and assessing information through the use of such displays, especially in critical operating situations, canbe increased substantially. This paper describes the application of a PLC for gathering data from solid state motor protective devices and displaying that information in a control room some distance away. The PLC logic programming and BASIC programming required to accomplish the display of information are described. Programming tools and techniques to aid the engineer in implementing such a system are discussed.