WAGO-I/O-SYSTEM 750
Commissioning 67
750-496 8AI 0/4-20mA S.E.
Manual
Version
1.2.2
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7.3
Scaling Measured Values
User scaling serves to adjust the process values. When user scaling is used, the
required accuracy of the process value resolution is changed, but not
fundamentally limited. User scaling is optional.
The values for “Gain” and “Offset” are required to perform user-defined scaling.
The scaling gain is the gain factor. The scaling offset is the offset on the y axis.
When these two values are input, a scaled process value is yielded as the result.
The following general scaling equation applies:
• y2 = y1 × (Gain / 1024) + Offset
The variables have the following meaning:
Table 35: Variable Legend – Scaling Measured Values
Variable
Meaning/function
y2
Scaled process value
y1
Unscaled process value
Gain
Scaling gain (gain factor)
Offset
Scaling offset (offset)
1024
Resolution 1/1024
The y1 value (unscaled process value) serves as the input value for the user
scaling. With user scaling switched off, the y1 value is transferred unchanged to
y2.
