44
Process Image
4.3.2.2
Resistance and Voltage Measurements
Figure 9: Process of Calculating Measured Value from Process Value – Resistance/Voltage
Measurements
This yields the following formulas for converting the local bus process value to
the measured value:
E.g., for a measurement range of ±30 mV:
Standard format:
S5-FB250 format:
E.g., for a measurement range of 4 kΩ:
Standard format:
S5-FB250 format:
E.g., for a measurement range strain gauge U
Standard format:
S5-FB250 format:
E.g., for a measurement range strain gauge U
Standard format:
S5-FB250 format:
where x = (INT16)process value and U/R is a float/double!
Manual
Version 1.1.0, valid from FW Version 02
750-489 4AI RTD/TC/Strain Gauge Ex i
() =
∗
() =
∗
/
() =
∗
() =
∗
/
() =
∗
(±15 mV):
d
() =
∗
/
() =
∗
(2.4 V):
ref
() =
∗
/
WAGO-I/O-SYSTEM 750