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