W.E.S.T. Elektronik POS-123-P, Technical Documentation Manual

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Page 36 of 58 POS-123-*-2030 23.08.2019
5.8.2 AINMODE
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.
5.8.2.1 AINMODE (Input scaling mode)
Command Parameter Unit Group
AINMODE x x= EASY|MATH -
STD
This command is used to switch over the kind of input scaling.
5.8.2.2 AIN (Analogue input scaling)
Command Parameters Unit Group
AIN:i
A
B
C
X i= W|X|V
a= -10000… 10000
b= -10000… 10000
c= -10000… 10000
x= V|C
-
-
0,01 %
-
MATH
This command can be used to scale the individual inputs. The following linear equation is used for scaling.
) ( c Input
b
a
Output
 
The
”c” value
is the offset (e.
g. to compensate the 4 mA in case of a 4… 20 mA input). The variables ”a”
and
”b”
define the gain factor.
e.g.: 2.345 correspond to:
a
= 2345,
b
=1000
The internal measuring resistor for measuring the current (4… 20 mA) is activated via the
x value and the
evaluation switched over accordingly.