Function Description
Operating Manual PNOZ m EF 4AI
1004650-EN-02
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The following tolerances can be configured:
Difference tolerance
The tolerance value defines the maximum permitted deviation between the two numerical
values. There are three different types of tolerance determination:
Absolute tolerance
Percentage tolerance
Absolute/percentage toler-
ance
Absolute value by which the
signals can deviate from
each other as a maximum.
Max. percentage by which
the signals may differ.
Combined tolerance. Both an
absolute value and a percent-
age value are configured.
The higher tolerance value is
valid, respectively.
Peak tolerance
Peak values can be tolerated, that exceed the permitted deviation configured above for a
short period.
}
Tolerance time (t1)
Maximum time for which the tolerance value may be exceeded
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Tolerance period (t2)
Minimum time that may elapse from one limit value overshoot to the next
Plausibility signal
Leading signal
Analogue value valid
mA
t
0
1
t1
t2
t1
Deviation
tolerance
Fig.: Leading signal remains within the tolerance limits
