5.1.3
The mapping of the analog input signals onto a frequency or percentage reference
value is possible for various demands. The parameterization is to be done via two
points of the linear characteristic of the reference channel.
The characteristic point 1, with the coordinates X1 and Y1, and the characteristic point
2, with the coordinates X2 and Y2, are to be set in the four data sets.
The characteristic points X1 and X2 are stated as percentages, as the analog input can
be switched as a current or voltage input via switch S3.
The coordinates of the characteristic points are related as a percentage to the analog
signal, with 10 V or 20 mA, and the parameter
ter
done via the digital inputs and/or by selecting the characteristic points.
The definition of the analog input characteristic can be calculated via the two-point
form of the straight line equation. The speed Y of the drive mechanism is controlled
according to the analog control signal X.
Attention! Monitoring of the analog input signal via the parameter
5.1.4
The operation modes of the analog input characteristic enable application-related scal-
ing as a supplement to the characteristic points stated. One of the four linear types of
characteristic is selected for adaptation of the signal for the analog input signal via the
parameter
of characteristic selected, the characteristic points are corrected internally.
Further information on the operation modes stated in the table can be found in the
following chapter "Examples".
52
52
Characteristic
Parameter
No.
Description
564 Characteristic point X1
565 Characteristic point Y1
566 Characteristic point X2
567 Characteristic point Y2
Maximum reference percentage
Behavior
563 demands a check of the characteristic parameters. Sensible
use is only possible if the
range.
Operation modes
Operation mode
Operation mode
1 - bipolar
11 - unipolar
21 - unipolar
2...10 V / 4...20 mA
101 - bipolar abs. value
Min.
-100.00 %
-100.00 %
-100.00 %
-100.00 %
Maximum Frequency
519. The change of direction of rotation can be
Y2
-
Y1
(
)
Y
=
⋅
X
−
X1
X2
-
X1
Characteristic point X1
562. If the characteristic points are not suited for the type
The analog input signal is mapped onto the reference
figure according to the characteristic points (X1/Y1)
and (X2/Y2).
With a negative parameter value of the characteristic
points X1 or X2, they are mapped to the reference
value zero.
If the characteristic points X1 or X2 have been set with
a negative parameter figure or smaller than 20%, the
input characteristic is mapped to the reference value
20%.
Negative parameter values of the characteristic points
Y1 or Y2 are mapped as a positive reference value in
the characteristic.
Setting
Max.
Fact. sett.
100.00 %
-98.00 %
100.00 %
-100.00 %
100.00 %
98.00 %
100.00 %
100.00 %
419 or parame-
+
Y1
Error/Warning
564 is in the positive
Function
06/05
06/05
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