PLC Timer and Counter Instructions
The RTO instruction requires a separate ______ instruction to reset its accumulated value.
RES
When the ___ timer instruction is de-energized, the timer increases the accumulated value by the amount of time the instruction is de-energized.
RTO
The CTU instruction increases its ___ by one each time the rung contains the instruction goes from false to true.
accumulated value
The __ instruction decreases the accumulated value by 1 each time the rung containing the instruction goes from false to true.
count down
A PLC time-driven sequencing program can be designed by using a series of timer instructions with each instruction controlling a(n) __________ in the sequence.
event
To enter a CTUD counter instruction, both the CTU and CTD instructions must have the same ___.
instruction tag
A counter's done bit is set whenever the accumulated value is equal to or greater than the ____ value.
preset
A ___ timer accumulates the total amount of time the instruction has been energized and reigns this value even when de-energized.
retentive
The ____ timer instruction energizes its DN bit after its accumulated value is equal to its preset value.
timer on delay
PLC programs can use __________ as well as limit switches to sequence events.
timers