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
Binary
Hex.
Dec.
<
−60.0
< 69.16
'1000.0000.0000.0001'
0x8001
−32767
0x41
ON
−60.0
69.16
'1111.1101.1010.1000'
0xFDA8
−600
0x00
OFF
−50.0
74.26
'1111.1110.0000.1100'
0xFE0C
−500
0x00
OFF
0.0
100.00
'0000.0000.0000.0000'
0x0000
0
0x00
OFF
50.0
129.10
'0000.0001.1111.0100'
0x01F4
500
0x00
OFF
100.0
161.77
'0000.0011.1110.1000'
0x03E8
1000
0x00
OFF
150.0
198.62
'0000.0101.1101.1100'
0x05DC
1500
0x00
OFF
200.0
240.64
'0000.0111.1101.0000'
0x07D0
2000
0x00
OFF
250.0
289.13
'0000.1001.1100.0100'
0x09C4
2500
0x00
OFF
> 250.0
> 289.13
'0010.0001.0011.0100'
0x2134
8500
0x42
ON
Wire break at R
L
'0010.0001.0011.0100
0x2134'
8500
0x42
ON
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.
