30 Process Image WAGO-I/O-SYSTEM 750
750-461 2AI Pt100/RTD
Manual
Version 1.4.1
4.2.1 Ni100
The 750-461/000-004 version calculates the resistance values of Ni100 sensors
and outputs the data as temperature values. The temperature values are
displayed at a resolution of 1 digit per 0.1 °C in one word (16-bit). Temperature
values below 0 °C are represented in two's complement binary. As a result, 0 °C
corresponds to the numeric value 0x0000 and 100 °C to the numeric value
0x03E8 (dec. 1000). The possible numeric range corresponds to the defined
temperature range of −60 °C to +250 °C for type Ni100 sensors.
Table 21: Process Image, Ni100, with Wire Break Diagnostics
Temperature
°C
Resistance
Ω
Numeric value
1)
Status
Byte
Hex.
LED
Error
AI 1, 2
L
1)
Process values below 0 °C are represented in two's complement binary
The measured value can exceed a decimal range of −600 to +2500 before
limitation takes effect.