33.4 PRACTICE PROBLEMS

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1. Documentation of a PLC Ladder Logic program requires:

a) A copy of the uncommented Ladder Logic Program

b) A copy of the commented Ladder Logic program

c) A copy of the commented Ladder Logic program and a listing of the

inputs/outputs and their addresses

d) None of the above

(ans. c)

2. TRUE / FALSE -- When planning Ladder Logic, the inputs/outputs should be chosen before anything else.

(ans. true)

3. List 5 advantages of using structured design and documentation techniques.

ans.

- more reliable programs

- less debugging time

- more routine

- others can pick up where you left off

- reduces confusion