A counter's input signal can come from an external device such as a sensor.
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Q1: A down-counter output instruction will decrement by
Q2: The counter reset (RES)instruction,it is always given
Q3: In normal use,the down-counter is used in
Q4: Programmed counters can serve the same function
Q5: Some PLC counters operate on the leading
Q7: Up and down counters may be programmed
Q8: All up-counters count only to their preset
Q9: Every PLC model offers some form of
Q10: Counters can count past their preset values.
Q11: Encoder pulses can be counted to measure
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