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5.7 Special commands
5.7.1 AINMODE (Scaling mode)
Command
AINMODE
This command is used to switch over the kind of input scaling.
The AINMODE is used to define the kind of parameterizing of the analogue inputs. The EASY mode
(DEFAULT) supports a simple and application oriented input scaling.
The MATH mode supports the free input scaling by a linear equation. This mode is compatible to our older
modules.
Attention: This command can be executed in the terminal window only. In case of switching back,
DEFAULT data should be reloaded.
5.7.2 AIN (Analogue input scaling)
Command
AIN:I
A
B
C
X
This command offers an individual scalable input. The following linear equation is used for the scaling.
"C" value
is the offset (e.g. to compensate the 4 mA in case of a 4... 20 mA input signal).
The
A
B
The variables
and
if using 4... 20mA input signal, defined in default current settings by A = 1250 and B = 1000). The internal
shunt for the current measuring is activated with switching the
The gain factor is calculated by setting the usable range (
signal. Usable are 0... 20mA, means (
of 16 (20-4). Not used are 0... 4mA. In a range of 20mA this is an offset of 20%, means a value of 2000 for
C
(
). Last but not least (
In this case AIN command would look like this:
AIN:I 20 16 2000 C or AIN:I 1250 1000 2000 C (see below)
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Parameter
x
x= EASY|MATH
Parameters
i= W|X
a= -10000... 10000
b= -10000... 10000
c= -10000... 10000
x= V|C
Output
are defining the gain factor with which the signal range is scaled up to 100 % (e.g. 1.25
) has the value 20. Really used are 4... 20mA, means (
A
X
) has to be set to C choosing current signal.
Unit
-
Unit
-
-
0.01 %
-
a
(
Input
c
)
b
X
value.
A
) in relation to the real used range (
PQP-171-P
Group
TERMINAL
Group
MATH
B
) of the input
B
) has a value
05.06.2020
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