Question 1

Which instruction can best be used to turn an output coil on or off after the rung has been false for a desired time?

Accepted Answer

A)  RTO
B)  TON
C)  ON OFF
D)  TOFE) A) and C)
F) A) and B)

Question 2

For ControlLogix controllers the time base is fixed at 1 second.

Accepted Answer

A) True 
 B)False

Question 3

The timer file for SLC 500 controllers is:

Accepted Answer

A)  T1
B)  T2
C)  T3
D)  T4E) A) and B)
F) A) and C) D

Question 4

The only way to reset a TON instruction is to use a Reset (RES) instruction.

Accepted Answer

A) True 
 B)False

Question 5

Timer instructions are found on all PLCs manufactured today.

Accepted Answer

A) True 
 B)False

Question 6

The preset time of a TON timer instruction represents the amount of time that has elapsed from when the instruction became true.

Accepted Answer

A) True 
 B)False

Question 7

The type of timer program shown is a:

Accepted Answer

A)  retentive on-delay.
B)  retentive off-delay.
C)  nonretentive off-delay
D)  nonretentive on-delay.E) B) and D)
F) A) and B)

Question 8

Which one of the following timer parameters determines the time duration for the timing circuit?

Accepted Answer

A)  Accumulated time.
B)  Preset time.
C)  Timer address.
D)  Time base.E) None of the above
F) A) and B)

Question 9

For the program shown, the timer starts timing when:

Accepted Answer

A)  PB1 is closed.
B)  PB2 is closed.
C)  both PB1 and PB2 are closed.
D)  either PB1 or PB2 is closed.E) A) and D)
F) A) and B)

Question 10

For the timer program shown, output C is switched ON when:

Accepted Answer

A)  power is applied.
B)  input A is closed.
C)  the timer is accumulating time.
D)  the accumulated value equals the preset value.E) A) and B)
F) A) and C)

Question 11

A retentive timer must be completely timed out to be reset.

Accepted Answer

A) True 
 B)False

Question 12

Cascading timers provide a method to extend the timing range.

Accepted Answer

A) True 
 B)False  True

Question 13

For the programmed timer circuit shown the ____ bit of the timer functions similar to an instantaneous contact.

Accepted Answer

A)  DN
B)  EN
C)  PB1
D)  PB2E) A) and C)
F) C) and D)

Question 14

For the programmed timer circuit shown, when the switch is initially closed motor(s)  _____ start(s)  immediately.

Accepted Answer

A)  M1
B)  M2
C)  M3
D)  all of theseE) A) and B)
F) C) and D)

Question 15

The on-delay timed period for the timer shown would be:

Accepted Answer

A)  3 seconds
B)  4 seconds
C)  20 seconds
D)  200 secondsE) A) and D)
F) B) and C)

Question 16

In the hardwired circuit shown, the light will stay on:

Accepted Answer

A)  as long as S1 is closed.
B)  for 5 s after coil TD is energized.
C)  for 5 s after coil TD is de-energized.
D)  as long as S1 is closed and for 5 s after coil TD is de-energized.E) A) and B)
F) A) and D)

Question 17

The interconnecting of timers is commonly called:

Accepted Answer

A)  grouping.
B)  programming.
C)  sequencing.
D)  cascading.E) A) and B)
F) None of the above

Question 18

The loss of logic continuity to either a TON or TOF timer causes the timer instruction to reset.

Accepted Answer

A) True 
 B)False

Question 19

The instantaneous contacts of a timer have no time-delay period associated with them.

Accepted Answer

A) True 
 B)False  True

Question 20

For the timer relay contact shown, when the relay coil is energized, there is a time delay before the contact opens.

Accepted Answer

A) True 
 B)False

Exam 5: Programming Timers

Which instruction can best be used to turn an output coil on or off after the rung has been false for a desired time?

Correct AnswerverifiedShow Answer

For ControlLogix controllers the time base is fixed at 1 second.

Correct AnswerverifiedShow Answer

The timer file for SLC 500 controllers is:

Correct AnswerverifiedD

The only way to reset a TON instruction is to use a Reset (RES) instruction.

Correct AnswerverifiedShow Answer

Timer instructions are found on all PLCs manufactured today.

Correct AnswerverifiedShow Answer

The preset time of a TON timer instruction represents the amount of time that has elapsed from when the instruction became true.

Correct AnswerverifiedShow Answer

The type of timer program shown is a:

Correct AnswerverifiedShow Answer

Which one of the following timer parameters determines the time duration for the timing circuit?

Correct AnswerverifiedShow Answer

For the program shown, the timer starts timing when:

Correct AnswerverifiedShow Answer

For the timer program shown, output C is switched ON when:

Correct AnswerverifiedShow Answer

A retentive timer must be completely timed out to be reset.

Correct AnswerverifiedShow Answer

Cascading timers provide a method to extend the timing range.

Correct AnswerverifiedTrue

For the programmed timer circuit shown the ____ bit of the timer functions similar to an instantaneous contact.

Correct AnswerverifiedShow Answer

For the programmed timer circuit shown, when the switch is initially closed motor(s) _____ start(s) immediately.

Correct AnswerverifiedShow Answer

The on-delay timed period for the timer shown would be:

Correct AnswerverifiedShow Answer

In the hardwired circuit shown, the light will stay on:

Correct AnswerverifiedShow Answer

The interconnecting of timers is commonly called:

Correct AnswerverifiedShow Answer

The loss of logic continuity to either a TON or TOF timer causes the timer instruction to reset.

Correct AnswerverifiedShow Answer

The instantaneous contacts of a timer have no time-delay period associated with them.

Correct AnswerverifiedTrue

For the timer relay contact shown, when the relay coil is energized, there is a time delay before the contact opens.

Correct AnswerverifiedShow Answer

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