ADVANCED PLCS TEST 3 EXAM QUESTIONS AND ANSWERS
A _____ timer accumulates the total amount of time the instruction has been energized and retains this
value even when de-energized. - CORRECT ANSWER✅✅retentive
The _____ timer instruction energizes its DN bit after its accumulated value is equal to its preset value. -
CORRECT ANSWER✅✅Timer On-Delay
When the _____ timer instruction is de-energized, the timer increases the accumulated value by the
amount of time the instruction is de-energized. - CORRECT ANSWER✅✅Timer Off-Delay
The RTO instruction requires a separate _____ instruction to reset its accumulated value. - CORRECT
ANSWER✅✅RES
PLC programs can use timers as well as _____ to sequence events. - CORRECT ANSWER✅✅Limit
switches
PLC time-driven sequencing program can be designed by using a(n) _____ of timer instructions, with
each instruction controlling an event. - CORRECT ANSWER✅✅series
The CTU instruction increases its _____ by one each time the rung containing the instruction goes from
false to true. - CORRECT ANSWER✅✅accumulated value
A counter's done (DN) bit is set to whenever the accumulated value is equal to or greater than the
_____ value. - CORRECT ANSWER✅✅preset
The _____ instruction decreases the accumulated value by 1 each time the rung containing the
instruction goes from false to true. - CORRECT ANSWER✅✅Count down
To enter a CTUD counter instruction, both the CTU and the CTD instructions must have the same _____.
- CORRECT ANSWER✅✅instruction tag
A _____ timer accumulates the total amount of time the instruction has been energized and retains this
value even when de-energized. - CORRECT ANSWER✅✅retentive
The _____ timer instruction energizes its DN bit after its accumulated value is equal to its preset value. -
CORRECT ANSWER✅✅Timer On-Delay
When the _____ timer instruction is de-energized, the timer increases the accumulated value by the
amount of time the instruction is de-energized. - CORRECT ANSWER✅✅Timer Off-Delay
The RTO instruction requires a separate _____ instruction to reset its accumulated value. - CORRECT
ANSWER✅✅RES
PLC programs can use timers as well as _____ to sequence events. - CORRECT ANSWER✅✅Limit
switches
PLC time-driven sequencing program can be designed by using a(n) _____ of timer instructions, with
each instruction controlling an event. - CORRECT ANSWER✅✅series
The CTU instruction increases its _____ by one each time the rung containing the instruction goes from
false to true. - CORRECT ANSWER✅✅accumulated value
A counter's done (DN) bit is set to whenever the accumulated value is equal to or greater than the
_____ value. - CORRECT ANSWER✅✅preset
The _____ instruction decreases the accumulated value by 1 each time the rung containing the
instruction goes from false to true. - CORRECT ANSWER✅✅Count down
To enter a CTUD counter instruction, both the CTU and the CTD instructions must have the same _____.
- CORRECT ANSWER✅✅instruction tag
