Measured
value
Limit value
Limit value violation
(e.g. exceedance)
Lead time
Minimum
switch-on time
Comparator
result
2 seconds
Comparator running times
Comparator running times are time counters, which
are added together at a set comparator output. i.e.
if the condition of the comparator is fulfilled and the
lead time has elapsed, the counter is increased by
the corresponding amount of time - this does not take
account of the min. switch-on time!
Comparator with set limit value violation
• The set limit value is compared to the measured value.
• If the limit value violation occurs for at least the
duration of the lead time, the comparator result is
changed.
• The result is retained for at least the duration of
the min. switch-on time and for no longer than the
duration of the limit value violation. If there is no longer
a limit value violation and the min. switch-on time has
elapsed, the result is reset.
Comparator
running time
6 seconds
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