WAGO-I/O-SYSTEM 750
Process Image
93
750-464 2/4 AI RTD configurable
Manual
Version 1.0.1
7.4.10
Resistance Measurement 10 Ohm to 5.0 kOhm
With the setting "Resistance measurement 10 Ohm to 5.0 kOhm" and activated
Siemens format, the I/O module outputs the resistance measured values of the
sensors directly.
The resistances values are displayed at a resolution of 1 digit per 4 Ω. The status
information is depicted in bit 0 to bit 2 and the digitalized measured value in bit 3
to bit 15.
Table 79: Process image for 750-
464, setting 10 Ω ... 5 kΩ
Resistance
Ω
Numeric value
1)
with status information
4)
Status
byte
hex.
LED
error
AI 1, 2
Binary
XFÜ
Hex.
Dec.
< 9
'0000.0000.0001.0 100'
0x0013
19
0x51
on
Short circuit
2)
< 10
'0000.0000.0001.0 100'
0x0011
17
0x41
on
Underrange
3)
10
'0000.0000.0001.0 100'
0x0010
16
0x00
off
100
'0000.0000.1100.1 000'
0x00C8
200
0x00
off
200
'0000.0001.1001.0 000'
0x0190
400
0x00
off
300
'0000.0010.0101.1 000'
0x0258
600
0x00
off
1000
'0000.0111.1101.0 000'
0x07D0
2000
0x00
off
2000
'0000.1111.1010.0 000'
0x0FA0
4000
0x00
off
3000
'0001.0111.0111.0 000'
0x1770
6000
0x00
off
4000
'0001.1111.0100.0 000'
0x1F40
8000
0x00
off
5000
'0010.0111.0001.0 000'
0x2710
10000
0x00
off
> 5000
'0010.0111.0001.0 000'
0x2711
10001
0x42
on
Overrange
3)
> 5500
'0010.0111.0001.0 000'
0x2713
10003
0x62
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 "Behavior in the Event of an
Error")
3) When underrange / overrange limit is ON (see section "Behavior in the Event of an Error")
4) Status information: X: Not used, F: Short circuit, wire break, Ü: Overrange
