Manufacturing Engineering Programmable Logic Controllers (PLC) Copyright © Texas Education Agency, All rights reserved. 1

Bell Work Activity Directions: Please take out a sheet of paper and answer the following questions. A.How would you feel if every time you took an elevator, everyone on board had to tell a human elevator operator which floor to go to? B.Would you rather have a police officer stand at an intersection and direct traffic or have a traffic light? Why or why not? Copyright © Texas Education Agency, All rights reserved. 2

A. There are several important terms and definitions students need to know. B. Students will now complete the Matching Definitions handout on Programmable Logic Controllers. Students may work in groups. Warm-up Activity Programmable Logic Controllers Terms Copyright © Texas Education Agency, All rights reserved. 3

Programmable Logic Controllers (PLC) A PLC is an electronic device used in the automated control of industrial equipment. PLCs have a wide variety of uses from computerized factory automation to amusement park rides. Copyright © Texas Education Agency, All rights reserved. 4

Programmable Logic Controllers In the1960s PLCs were first used in the automotive industry. As technology began to advance, automakers needed a faster way to re-configure assembly lines to incorporate robots to automate the assembly line process. Copyright © Texas Education Agency, All rights reserved. 5

An Operational PLC System We will discuss a flow diagram for a typical PLC controlled, fluid transfer system used in a manufacturing setting. Copyright © Texas Education Agency, All rights reserved. 6

Fluid Transfer System Flowchart Copyright © Texas Education Agency, All rights reserved.. 7 Tank A Tank B Pump Flow meter Valve A Valve B Valve C Valve D F 5 F 3 F 4 F 2 F 1

Fluid Transfer System: Troubleshooting Copyright © Texas Education Agency, All rights reserved.. 8 Tank A Tank B Pump Flow meter Valve A Valve B Valve C Valve D F 5 F 3 F 4 F 2 F 1