Deck 18: Controllogix Controllers - Part 4 - Programming Counters

Question 1

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

Answer 1

C

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

A

Question 3

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

Answer 3

True

Question 4

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

Question 5

The acronym CTU stands for a count- up counter.

Question 6

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

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

Question 7

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 8

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

Question 9

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

Question 10

All counters are non-retentive.

Question 11

The acronym CTD stands for a count- down counter.

Question 12

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 13

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