WAGO-I/O-SYSTEM 750
Process Image 35
750-450 4 AI RTD
Manual
Version 1.2.0
4.3.3
Ni100 (DIN 43760), ID 1
4.3.3.1 Standard Format
The "Ni100 (DIN 43760)" setting is used by the I/O module to convert the
resistance measured values from Ni100 sensors (DIN 43760) to temperature
values and outputs the results in degrees Celsius.
The temperature values are displayed with a resolution of 1 digit per 0.1 °C in
one word (16 bits). 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 0x03E8 (dec. 1000). The maximum range in the two's complement
representation that can be displayed with one word ranges from -32768 to
+32767. The numeric range that is used depends on the set sensor type and on
the resolution for the process value. With the "Ni100 (DIN 43760)" setting, the
possible numeric range corresponds to the temperature range of −60 °C to +250
°C, meaning it covers a range of −600 to +2500.
Table 28: ID 1, Ni100 (DIN 43760) Setting, Standard Format
Temperature
°C
Resistance
Ω
Numeric value
1)
Status
byte
hex.
Error
LED
Binary
Hex.
Dec.
---
< 10.00
'1111.1101.1010.1000'
0xFDA8
−600
0x50
ON
Short circuit
2)
< −60.0
< 69.52
'1111.1101.1010.1000'
0xFDA8
−600
0x41
ON
Underrange
3)
−60.0
69.52
'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
129.11
'0000.0001.1111.0100'
0x01F4
500
0x00
OFF
100.0
161.78
'0000.0011.1110.1000'
0x03E8
1000
0x00
OFF
150.0
198.64
'0000.0101.1101.1100'
0x05DC
1500
0x00
OFF
200.0
240.66
'0000.0111.1101.0000'
0x07D0
2000
0x00
OFF
250.0
289.16
'0000.1001.1100.0100'
0x09C4
2500
0x00
OFF
> 250.0
> 289.16
'0000.1001.1100.0100'
0x09C4
2500
0x42
ON
Overrange
3)
---
> 5010.00
'0000.1001.1100.0100'
0x09C4
2500
0x60
ON
Wire break
2)
1) Temperature values below 0 °C are represented in two's complement binary.
2) When short circuit and wire break monitoring is on (see Section "Diagnostics" > "Error
Response")
3) When lower/upper limit violation detection is on (see Section "Diagnostics" > "Error Response")