Prgrammable Logic Controller

1. Programmable Logic Controllers

3. Introduction

8. Components of PLC

10. PLC Components

11. PLC Functioning

12. PLC’s Perform Scans Sequentially and Cyclically

13. Typical PLC Scan Sequence

14. PLC programming

15. Typical Inputs and their Representation

16. Inputs (Continued )

17. Inputs (Continued )

18. Inputs (Continued )

19. Inputs (Continued )

20. An Electro Mechanical Relay

21. Typical Outputs and Their Representation

25. Example Programs

26. Design a Control Program for a Water Pump Motor

27. Product in Position (LS1 Close) Start button on. Conveyer moves product to A (Limit switch LS1 returns to normal) Conveyer moves the Product to A and stops Distance to A counted by encoder (8 Pulses) Waits at A for 10 s Moves again to LS2 and stops Emergency stop Emergency stop resets counter and timer

29. Applications

34. PLC Selection

36. Typical PLC Specification

42. Thank You