Moeller Marine XI/OC SIGNAL MODULES 05/02 AWB2725-1452GB User Manual
Temperature acquisition
module XIOC-4T-PT
module XIOC-4T-PT
05/02 AWB2725-1452GB
16
Data evaluation
Range 1: –50 to +400 °C (Pt100/Pt1000)
The temperature is converted into a signed 15 bit value. The
weighting of the bits can be seen in the following diagram.
weighting of the bits can be seen in the following diagram.
Example 1
If you enter these bit values in the table above, the result is the
following value:
following value:
–800 + 400 + 200 + 100 + 50 = –50 °C
Example 2
25 + 12.5 = 37.5 °C
If the measured value for the temperature lies outside the range
(< –51 °C or > 410 °C), then the data value is displayed as
7FFF
(< –51 °C or > 410 °C), then the data value is displayed as
7FFF
hex
.
The relationship between temperature and the measured value is
shown by the following equation and the diagram.
shown by the following equation and the diagram.
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
°C
–800
200
50
12.5
3.125
0.781
0.195
0.0488
400
100
25
6.25
1.563
0.391
0.0977
0.0244
F800
hex
= 1 1 1 1
1 0 0 0
0 0 0 0
0 0 0 0
F
hex
8
hex
0
hex
0
hex
0600
hex
= 0 0 0 0
0 1 1 0
0 0 0 0
0 0 0 0
0
hex
6
hex
0
hex
0
hex
Temperature
(°C)
(°C)
=
Decimal value, e.g. 256 (0100
hex
)
= 6.26 (°C)
40.96
Figure 20 : Temperature/measurement diagram
4000
hex
3000
hex
2000
hex
1000
hex
0800
hex
–50
0
50
100
200
300
400
[˚C]
F800
hex
Value