Programmable Controllers: Theory and Implementation
Programmable Controllers: Theory and Implementation
Programmable Controllers: Theory and Implementation
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Introduction to PLC Programming <strong>and</strong> <strong>Implementation</strong>—from relay logic to PLC logic27 Circle the locations where timer traps will be used in the PLC implementation of thecircuit in Figure 9.L1123StopTR1StartTR1TR1S1TR1M1L2OL4M1TR1S156S1S2S2Figure 9. Circuit for problem 27.28 Figure 10 shows a variable speed drive that is manually controlled by an operatorstation. What input field devices are required for the PLC implementation of thisstation?SpeedPotentiometerTB-112Adjust+12 VTo Speed RegulatorForward34ForwardCommon (Controller)Reverse5ReverseChassisGround6CR1StartRun7CR1StopOLJog8Spare115VACOLOL9SpareField10DriveFigure 10. Variable speed drive.Industrial Text & Video Company www.industrialtext.com 1-800-752-839861