Analog ramp (AQ) Mathematic instruction
(AQ)
PI controller (AQ) Up/down counter (Cnt)
Analog filter (AQ) Average value (AQ)
Max/Min (AQ) On-delay (Ta)
Off-delay (Ta) On-/off-delay (Ta)
Retentive on-delay (Ta) Wiping relay(pulse output)
(Ta)
Edge triggered wiping relay (Ta)
Asynchronous pulse generator (Ta)
Stairway light switch (Ta) Multiple function switch
(Ta)
Stopwatch (Ta)
The value of “MI” can be set and modified in parameter
mode.
Description of the function
The hour’s counter monitors input En. As long as the
status of this input is 1, xLogic calculates the time expired
and the time-to-go MN. xLogic displays these times when
it is set to configuration mode. The output is set to 1 when
the time-to-go is equal to zero.
You reset output Q and the time-to-go counter to the
specified value, MI with a signal at input R. The operation
hour counter, OT remains unaffected.
You reset output Q and the time-to-go counter to the
specified value MI with a signal at input Ral. The operation
hour counter, OT is reset to 0.
Depending on your configuration of the Q parameter, the
output is either reset with a reset signal at input R or Ral
or when the reset signal is 1 or the En signal is 0.
The limit value of OT
The values of the operating hours in OT are retained when
you reset the hours counter with a signal at input R. The
hours counter OT continues the count as long as En = 1,
irrespective of the status at the reset input R. The counter
limit of OT is 99999 h. The hour’s counter stops when it
reaches this value.
Parameter Pre-set
In xLogicsoft, you can define MI and an OT start value.
You can set whether or not the behaviour of Q does or
does not depend on En by selecting the corresponding
checkbox.
Retentivity with the hour’s counter
The hours counter in the xLogic is generally retentive.
However, if the values of the hour’s counter are lost after
a power failure, then select the respective block in your
circuit program. Right mouse click on the hours counter
and select Block Properties > Parameters. The option
Retentivity must be activated and not changeable (greyed
out).
If the Retentivity option is not available, then delete the
block and insert a new special function hours counter at
the same position.
Threshold Trigger
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