Step 2 - Y; User Scaling - WAGO I/O-SYSTEM 750 Manual

12 • 750-562 [2 AO 0/+-10V DC 16 Bit]
Function Description
2.1.1.8.2 Step 2 – Y
The value for Y
bit 0 of the register 32. The value X
scaling. For switched-off user scaling, the value X
to Y
The calculation occurs taking into account the configured data format and the
quality rating of the results is determined by an amplification factor and an
offset.
Configuration of the user scaling
Register 33 - Offset
Register 34 - Gain
Calculation formula:
The user scaling serves to adjust a desired process value range to the analog
output range specified through the calibration.
Thus, for example, with a module calibrated from -10V to +10V, the process
data value range with a leading sign of -10000 to +10000 can be mapped to
this output value range.
The calculation for the user scaling is carried out module-internally in the 32
bit numeric range.
With the use of the user scaling, the required precision of the resolution of the
analog adjusting range is changed, but not essentially limited. It is at the
discretion of the user whether the user scaling should be used or not. With a
GainAS = 256, the resolution remains uninfluenced in the 16-bit wide numeric
range.
The value of 1/256 permits amplifications in the range from 0.0039 to
255,9960 and thus offers the user scaling a very high variation range.

User Scaling

1
is generated with the user scaling if this is approved through
1
.
1
AS
AS
Y = X * Gain / 256 + Offset
1 IN AS
serves as input value for the user
IN
is transferred unchanged
IN
Description
Offset
Amplification factor
AS
WAGO-I/O-SYSTEM 750
I/O Modules