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page 578

33.4 PRACTICE PROBLEMS

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

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