80 Scaling Measured Values
WAGO-I/O-SYSTEM 750
750-564 4AO U/I
Manual
Version 1.0.0
8
Scaling Measured Values
User scaling allows you to scale the process value on an application-specific
basis within the following voltage and current ranges by parameterizing the gain
and offset values:
•
Signal type “0–10 mA”: 0 mA ... 20 mA
•
Signal type “2–10 mA”: 0 mA ... 20 mA
•
Signal type “±10 mA”:
−
20 mA ... 20 mA
•
Signal type “0–12 mA”: 0 mA ... 20 mA
•
Signal type “±12 mA”:
−
20 mA ... +20 mA
•
Signal type “0–20 mA”: 0 mA ... 24 mA
•
Signal type “4–20 mA”: 0 mA ... 24 mA
•
Signal type “±20 mA”:
−
24 mA ... +24 mA
•
Signal type “0–22 mA”: 0 mA ... 24 mA
•
Signal type “±22 mA”:
−
24 mA ... +24 mA
•
Signal type “0–5 V”: 0 V ... +6 V
•
Signal type “1–5 V”: 0 V ... +6 V
•
Signal type “±5 V”:
−
6 V ... +6 V
•
Signal type “0–10 V”: 0 V ... +12 V
•
Signal type “2–10 V”: 0 V ... +12 V
•
Signal type “±10 V”:
−
12 V ... +12 V
•
Signal type “0–12 V”: 0 V ... +12 V
•
Signal type “±12 V”:
−
12 V ... +12 V
User scaling is optional.
The values for “Gain” and “Offset” are required in order to perform user scaling.
The scaling gain indicates the gain factor. The scaling offset indicates the offset
on the y axis. When these two values are input, a scaled process value results.
The following general scaling equation applies:
• y = (x + Offset) × (Gain / 16384)
The variables have the following meaning:
Table 62: Variable Legend – Scaling Process Values
Variable
Meaning/function
x
Unscaled process value
y
Scaled process value
Gain
Scaling gain (gain factor)
Offset
Scaling offset (offset)
16384
Resolution 1/16384
The x value (unscaled process value) serves as the input value for the user
scaling. With user scaling switched off, the x value is carried over to y
unchanged.
