Title: Chapter #8 Test
Course: Programmable Logic Controls (IC 107-IC 107) > Section: Assessments

Q: A counter is to be programmed to keep track of the number of parts coming off a production line. If you wanted to subtract the number of rejected parts so your counter would count only the good parts, you would program:
- two up-counters.
- two down-counters.
- an up/down counter.
- a counter with a transitional contact input.
A: two up-counters.

Q: All up-counters count only to their preset values, and additional counts are ignored.
- True
- False
A: False

Q: Counters are similar to timers, except that they do not operate on an internal clock.
- True
- False
A: True

Q: During normal operation of the program, the accumulated value of CTU would always be:
- the same as that of CTD.
- 150.
- between 50 and 100.
- between 0 and 100.
A: the same as that of CTD.

Q: For the counter table shown, word level addressing is used for:
- CU, CD, DN, OV, UN, and UA
- CU, CD, and DN
- OV and UN
- PRE and ACC
A: CU, CD, DN, OV, UN, and UA

Q: In normal use, the down-counter is used in conjunction with the up-counter to form an up/down-counter.
- True
- False
A: True

Q: Output PL will be energized when:
- the accumulated value of C5:0 reaches 32,000
- counter C5:0 is reset.
- the accumulated value of C5:1 reaches 32,000.
- the accumulated value of C5:0 and C5:1 reaches 32,000.
A: the accumulated value of C5:0 reaches 32,000

Q: Output PL2 will be energized:
- until the accumulated value equals the preset value,
- when the accumulated value equals the preset value.
- only when the accumulated value exceeds 10.
- only when the accumulated value is zero.
A: until the accumulated value equals the preset value,

Q: The counter file for SLC 500 controllers is:
- C2
- C3
- C4
- C5
A: C2

Q: The counter program shown is designed to:
- count up and count down.
- record the time of an event.
- count beyond the maximum count allowed per counter.
- count below the maximum count allowed per counter.
A: count up and count down.

Q: The counter reset (RES) instruction, it is always given the same address as the counter it is to reset.
- True
- False
A: True

Q: The output Lot Full Light will be energized when the accumulated count is:
- 0
- 150
- 100
- 300
A: 0

Q: When the accumulated count exceeds the preset count, the:
- accumulated value is set to zero.
- preset is set to zero.
- reset changes state.
- counter done bit is true.
A: accumulated value is set to zero.

Q: When the up-counter reset is set to true, the following happens:
- the preset value is set to 0.
- the preset value increments.
- the accumulated value is set to 0.
- the accumulated value is set to maximum.
A: the preset value is set to 0.

Q: Which of the following is not usually associated with a PLC counter instruction?
- Address
- Preset Value
- Time Base
- Accumulate Value
A: Address