User manual

6 Detailed descriptions of I/O modules | Digital counter module UR20-2CNT-100
358 1432790000/08/12.2015Manual u-remote
Counting range
Limits Valid range of values
End value –2 147 483 647 (–2
31
+1) to [phone] (2
31
–1)
Lower count limit [phone] (-2
31
)
Periodic counting / primary direction down
Upper
count limit
Load value
End value
0
Gate start Gate stop
Counting value
Time
Periodic counting, primary direction down.
– Down-counting starts at the load value.
– If the parameterised end value +1 is reached during
counting in the negative direction, the counter jumps
back to the load value at the next count pulse and contin-
ues counting from there. The status bit "End value rea-
ched" is set and a process alarm will be triggered if it is
parameterised.
– Upon reaching the upper count limit the counter jumps to
the lower count limit to continue counting from there.
The status bit "Overflow performed" is set and a process
alarm will be triggered if it is parameterised. All status
bits remain set until they are reset with the bit "Reset sta-
tus bits" in the control word.
Counting range
Limits Valid range of values
End value –2 147 483 647 (–2
31
) to [phone] (2
31
–2)
Upper count limit [phone] (2
31
–1)
Additional counter features
You can dene the additional features for the counter listed
below by parametrising or via the process data outputs:
– Reset: resets the counting value to the load value during
counting.
– Comparator: Upon meeting the comparison condition,
the comparison bit is activated or a process alarm is trig-
gered.
– Hysteresis: reduces frequent toggling of the comparison
bit and/or excessive triggering of a process alarm, e.g.
when the value of a sensor signal fluctuates around the
comparison value.
Comparison value Process alarm
Comparator
Hysteresis
Counting value
Load value
Internal gate
SW gate Pulse/track A
Pulse evaluation
Direction/track B Reset
Release
Additional counter functions.