Counters are similar to timers,except that they do not operate on an internal clock.
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Q13: The counter accumulated value is the current
Q14: PLC counters are normally nonretentive.
Q15: A transitional off-to-on contact will allow logic
Q16: All PLC manufacturers require the reset rung
Q17: The counter number C5:4 represents counter file
Q19: The counter enable bit is true whenever
Q20: The output of the counter is energized
Q21: Normally counters are retentive.This means that if
Q22: The PLC counter instruction is similar to
Q23: Programmed counters can:
A)count up.
B)count down.
C)be combined to
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