Deck 16: Programming Counters

Question 1

For the counter instruction shown, which parameter specifies the value the counter must reach before the done bit turns on?

A)Count Up
B)Package_Counter
C)Preset
D)Accum

Answer 1

Preset

Question 2

The ControlLogix CTD instruction is typically used with a CTU instruction that references:

A)the same counter structure.
B)a different counter structure.
C)the same data table.
D)a different data table.

Answer 2

the same counter structure.

Question 3

A counter retains its Accum value if the rung goes false.

Answer 3

True

Question 4

A CTD counter will cause the accumulated value to ____ when there is a false to true transition of the counter rung.

A)reset to zero
B)increase by one
C)decrease by one
D)remain the same

Question 5

The two basic counter types are the right-counter and the left-counter.

Question 6

For the counter instruction shown, which parameter indicates the number of transitions of the counter rung?

A)Count Up
B)Package_Counter
C)Preset
D)Accum

Question 7

A counter counts the change of state of an external trigger signal.

Question 8

For the counter instruction shown, what is the counter's tag name?

A)Count Up
B)Package_Counter
C)Preset
D)Accum

Question 9

The counter Accum value is reset to zero by a:

A)RES instruction with a different tag name.
B)RES instruction with the same tag name.
C)true to false transition of the counter rung.
D)false to true transition of the counter rung.

Question 10

The acronym CTD stands for a count- down counter.

Question 11

Counters count:

A)true-to-false transitions of the counter rung.
B)false-to-true transitions of the counter rung.
C)the length of time a counter rung is true.
D)the length of time a counter rung is false.

Question 12

The acronym CTU stands for a count- up counter.

Question 13

All counters are non-retentive.