Technical data

W.E.ST. Elektronik GmbH
Page 17 of 25 PAM-190-P-*-1021 01.12.2014
5.2.3 AIN (Analogue input scaling)
Command
Parameters
Unit
Group
AIN:I A B C X
i= A
a= -10000… 10000
b= -10000… 10000
c= -500… 10000
x= V|C
-
-
0.01%
-
STD
This command can be used to scale the individual inputs. The following linear equation is used for scaling.
𝑦 =
𝑎
𝑏
∙
(
𝑥
𝑖𝑛𝑝𝑢𝑡
− 𝑐
)
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.
The X-value is not active in this module. Switching over from current to voltage input is
not possible. The modules a delivered as voltage or current input version (A or I Version)
and for this reason can only be changed in the scaling.
Typical settings:
Command
Input
Description
AIN:A 1000 1000 0 V
0… 10V
Range: 0… 100%
0… 10V for the activation of one solenoid.
AIN:A 10 8 1000 V or
AIN:A 1000 800 1000 V
1… 9V
Range: 0… 100%
The offset will be preset on 1000 (10% = 1V) and the gain on 1,25
(1… 9V (8V difference) will be expand to 0…100%.
AIN:A 20 16 2000 C
4… 20mA
Range: 0… 100%
The offset will be compensated on 20% (4 mA) and the signal (16
mA = 20mA – 4 mA) will be gained to the range of 100% (20 mA).