ELT 4050 - PLCs

1. Describe the invention and the development history of programmable logic controller (PLC) systems.
2. Discuss the benefits of PLCs over electromechanical relay logic systems.
3. Distinguish between fixed and modular PLC devices.
4. Discuss different types of Intel and Motorola microprocessors.
5. Explain different types of random access memory (RAM) devices and their use in PLC systems.
6. Explain different types of read only memory (ROM) devices.
7. Explain the use of the address decoder circuit in a PLC system.
8. List the major components of a PLC power supply.
9. Describe Allen-Bradley programmable controller devices.
10. Identify important questions to determine which PLC device to purchase.
11. Distinguish between Allen-Bradley fixed and modular SLC 500 processors.
12. Select modular Allen-Bradley SLC 500 series processor and chassis.
13. Select input or output modules for Allen-Bradley SLC 500 PLCs.
14. Recognize how to connect sensors and switches to PLC ports.
15. Describe the different types of PLC memory.
16. Describe the method to connect PLC devices to programming modules.
17. Explain the decimal number system.
18. Explain integer numbers, fractional numbers, and real numbers.
19. Describe the binary number system.
20. Convert decimal numbers to binary and vice versa.
21. Perform binary math operations such as add, subtract, multiply, and divide.
22. Explain the hexadecimal number system.
23. Convert binary numbers to hexadecimal numbers and vice versa.
24. Explain the octal number system.
25. Convert binary numbers to octal numbers and vice versa.
26. Explain the binary coded decimal number system and its use.
27. Convert decimal numbers to binary coded decimal.
28. Explain the Gray code number system and its use.
29. Explain ASCII and EBCDIC alphanumeric codes.
30. Use symbols to represent different types of input and output devices.
31. Create relay logic diagrams using the standard relay logic rules.
32. Place comments on relay logic devices using the standard rules.
33. Create relay logic circuits for process and industrial control problems.
34. List the rules for creating a PLC ladder logic diagram.
35. Convert a relay logic diagram to a PLC ladder logic diagram.
36. Create ladder logic diagrams when the PLC is in the offline mode.
37. Download PLC ladder logic diagrams and test them on a trainer.
38. Use the force instruction for troubleshooting.
39. Create and print program reports.
40. Use non-retentive and retentive timer ON-delay instructions to create PLC ladder logic diagrams.
41. Use move (MOV) instructions to create variable preset value timer instructions.
42. Use OFF-delay timers to create PLC ladder logic diagrams.
43. Connect timer instructions to interlock each other.
44. Use count up instructions to create PLC ladder logic diagrams.
45. Use count down instructions to create PLC ladder logic diagrams.
46. Reset counter instructions.
47. Connect different counter instructions and cascade counter instructions.
48. Use timer and counter instructions to create PLC ladder logic diagrams.
49. Create a PLC ladder logic diagram that uses the bit shift left (BSL) instruction.
50. Create a PLC ladder logic diagram that uses the bit shift right (BSR) instruction.
51. Reset the bit shift left or the bit shift right instruction to its starting bit position.
52. Create PLC ladder logic diagrams that incorporate one or more subroutines.
53. Create ladder logic diagrams for subroutine files.
54. Name or rename subroutine files.
55. Use input devices to call subroutine files.
56. Use compare instructions in the main PLC ladder logic diagram to call subroutine files.