EM-RES-03
10/07
52
52 EM-RES-03
10/07
6 Control inputs and outputs
6.1
Analog input EM-S1INA
6.1.1
General
The analog input of the EM-RES-03 expansion module can optionally be configured as
a voltage or a current input. Parameterization of the input signal is done by the defini-
tion of a linear characteristic and assignment as a
−
reference value source
(can be selected via the parameter
Reference frequency source
475),
−
reference percentage source
(can be selected via the parameter
Reference percentage source
476),
−
actual percentage source
(can be selected via the parameter
Actual percentage source
478, in configura-
tion x11) or
−
limit value sources
(can be selected via the parameters 734…737).
6.1.2
Characteristic
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, can be set in four parameters.
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.
Parameter
Setting
No.
Description
Min.
Max.
Fact. sett.
564 Characteristic point X1
-100.00 % 100.00 %
-98.00 %
565 Characteristic point Y1
-100.00 % 100.00 % -100.00 %
566 Characteristic point X2
-100.00 % 100.00 %
98.00 %
567 Characteristic point Y2
-100.00 % 100.00 %
100.00 %
The coordinates of the characteristic points are related as a percentage to the analog
signal, with 10 V or 20 mA, and the parameter
Maximum Frequency
419 or parame-
ter
Maximum reference percentage
519. The change of direction of rotation can be
done via the digital inputs of the frequency inverter and/or by selecting the character-
istic 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.
(
)
Y1
X1
X
X1
-
X2
Y1
-
Y2
Y
+
−
⋅
=
Attention!
Monitoring of the analog input signal via the parameter
Error/Warning
Behavior
563 demands a check of the characteristic parameters. Sensible
use is only possible if the
Characteristic point X1
564 is in the positive
range.
Содержание Vectron
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