36 Process Image
WAGO-I/O-SYSTEM 750
750-461 2AI Pt100/RTD
Manual
Version 1.4.1
Table 30: I/O Module 750-461/003-000, Input Fields for Hardware Matching
Input field
Settings
Offset
0xECF0
Gain
0x2700
2-Wire Offset
0x0180
Pos: 24.5 /Serie 750 (WAGO-I/O-SYSTEM)/Prozessabbild Lokalbus/AI/Prozessabbild 750-0461 NTC @ 28\mod_1487253695057_21.docx @ 408030 @ 2 @ 1
4.5
I/O Module for NTC Resistance Sensors
Table 31: I/O Module for NTC Resistance Measurement
750-461/020-000
NTC 20 kOhm
Measuring range:
−
30 °C … +130 °C
The measured resistance values are converted and output as temperature values
for evaluation of the NTC 20 kOhm resistance sensors. All temperature values
are represented in a standard numerical format. The possible numeric range
corresponds to the defined temperature range for the sensors of
−30
°C … +130 °C.
At the NTC 20 kOhm setting, the sensor temperature values are displayed at a
resolution of 1 digit per 0.1 °C in one word (16 bits). As a result, 0 °C
corresponds to the numeric value 0x0000 and 100 °C to 0x03E8 (dec. 1000).
Temperatures below 0 °C are represented in two's complement binary.
Table 32: Process Image for Version 750-461/020-000
Temperature
°C
Resistance
Ω
Numeric value
1)
Status
Byte
Hex.
LED
Error
AI 1, 2
Binary
Hex.
Dec.
<
ca. −30.
0
> 414.70
'0000.1000.0101.0110'
0x2134
8500
0x42
ein
−30.
0
414.70
'1111.1110.1101.0100'
0xFED4
−
300
0x00
aus
0.0
70.20
'0000.0000.0000.0000'
0x0000
0
0x00
aus
25.0
20.00
'0000.0000.1111.1010'
0x00FA
250
0x00
aus
50.0
6.72
'0000.0001.1111.0100'
0x01F4
500
0x00
aus
100.0
1.12
'0000.0011.1110.1000'
0x03E8
1000
0x00
aus
130.0
0.46
'0000.0101.0001.0100'
0x0514
1300
0x00
aus
> ca. 130.0
< 0.46
'1000.0000.0000.0001'
0x8001
−
32767
0x41
ein
1)
Temperature values below 0 °C are represented in two's complement binary.
The measured value can exceed a decimal range of
−
300 … +1300 before limitation takes effect.
Pos: 25 /Dokumentation allgemein/Gliederungselemente/---Seitenwechsel--- @ 3\mod_1221108045078_0.docx @ 21810 @ @ 1
