7.1.1.3.4 Application Examples Of Scaling; Table 58: Examples Of A Scaled Process Value, Standard Format; Table 59: Examples Of A Scaled Process Value, S5-Fb250 Format - WAGO 750-451 Manual

WAGO-I/O-SYSTEM 750
750-451 8 AI RTD

7.1.1.3.4 Application Examples of Scaling

• Example with the "Pt100 (IEC 751)" setting
How to calculate the scaled process value is described below. The equation
for calculating the scaled process value with the "Sensor type Pt100 (IEC
751)" setting in standard format with corresponding variables is:
((Unscaled process value × gain multiplier) / 256) + scaling offset = scaled
process value in °C
Example:
((20 °C × 512) / 256) + 20 = 60 °C
Other example calculations for the "Pt100 (IEC 751)" sensor type in standard
format are available in the table below.
Table 58: Examples of a Scaled Process Value, Standard Format, Pt100 (IEC 751)
Gain multiplier
256 (1**)
256 (1**)
384 (1.5**)
512 (2**)
640 (2.5**)
*) Unscaled process value
**) Multiplier (= gain multiplier/gain divisor)
Other example calculations for the "Pt100 (IEC 751)" sensor type in S5-FB250
format are available in the table below.
Table 59: Examples of a Scaled Process Value, S5-FB250 Format, Pt100 (IEC 751)
Gain multiplier
256 (1**)
256 (1**)
384 (1.5**)
512 (2**)
640 (2.5**)
*) Unscaled process value
**) Multiplier (= gain multiplier/gain divisor)
Scaling offset
in °C
at 20 °C*
0 20 °C
10 30 °C
15 45 °C
20 60 °C
20 70 °C
Scaling offset
in °C
at 20 °C*
0 20 °C
10 30 °C
15 45 °C
20 60 °C
20 70 °C
Commissioning
Scaled process value
at 30 °C* at 40.2 °C*
30 °C 40.2 °C
40 °C 50.2 °C
60 °C 75.3 °C
80 °C 100.4 °C
95 °C 120.5 °C
Scaled process value
at 30 °C* at 40.2 °C*
30 °C 40 °C
40 °C 50 °C
60 °C 75.5 °C
80 °C 100.5 °C
95 °C 120.5 °C
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