WAGO-I/O-SYSTEM 750 Process Image 31
750-461 2AI Pt100/RTD
Manual
Version 1.4.1
4.2.2 Ni1000 TK6180
The 750-461/000-005 version calculates the resistance values of Ni1000-TK6180
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 Ni1000 TK6180 sensors.
Table 22: Process Image, Ni1000 TK6180, with Wire Break Diagnostics
Temperature
°C
Resistance
Ω
Numeric value
1)
Status
Byte
Hex.
LED
Error
AI 1, 2
1)
Process values below 0 °C are represented in two's complement binary.
2)
For version 750-461/003-000, the hex. value is 0x8001, dec. value -32767
3)
For version 750-461/003-000, the hex. value is 0x2134, dec. value 8500
The measured value can exceed a decimal range of −600 to +2500 before
limitation takes effect.
For the adjustable version 750-461/003-000, the process image is identical
except for the hex./dec. values in the overflow and underflow.
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