Explain what each of the following quantities associated with a PlC timer instruction represents: a. Preset time
b. Accumulated time
c. TIme base
a. When is the enable bit of a timer instruction true?
b. When is the timer-timing bit of a timer instruction true?
c. When does the done bit of a timer change state?
3. State the method used to reset the accumulated time of each of the following:
a. TON timer
b. TOF timer
c. RTO timer
4. Compare the way a timer is addressed in the Allen-Bradley PlC-5 and SlC·500 controllers with the method used in a controller.
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