Siemens SIMATIC - Page 277

Principles of analog modules
5.1 Representation of the values for analog input channels
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
277
Representation of the analog values of thermocouples type R, S
Table 5- 31 Representation of the analog values of thermocouples type R, S
Type R, S
in °C
Units
Type R, S
in °F
Units
Types R, S
in K
Units
Range
dec
hex
dec
hex
dec
hex
> 2019.0
32767
7FFF
H
> 3276.6
32767
7FFF
H
> 2292.2
32767
7FFF
H
Overflow
2019.0
:
1769.1
20190
:
17691
4EDE
H
:
451B
H
3276.6
:
3216.4
32766
:
32164
7FFE
H
:
7DA4
H
2292.2
:
2042.3
22922
:
20423
598A
H
:
4FC7
H
Overshoot
range
1769.0
:
-50.0
17690
:
-500
451A
H
:
FE0C
H
3216.2
:
-58.0
32162
:
-580
7DA2
H
:
FDBC
H
2042.2
:
223.2
20422
:
2232
4FC6
H
:
08B8
H
Rated range
-50.1
:
-170.0
-501
:
-1700
FE0B
H
:
F95C
H
-58.2
:
-274.0
-582
:
-2740
FDBA
H
:
F54C
H
223.1
:
103.2
2231
:
1032
08B7
H
:
0408
H
Undershoot
range
< -170.0
-32768
8000
H
< -274.0
-32768
8000
H
< 103.2
< 1032
8000
H
Underflow
Representation of the analog values of thermocouples type T
Table 5- 32 Representation of the analog values of thermocouples type T
Type T
in °C
Units
Type T in °F
Units
Type T in K
Units
Range
dec
hex
dec
hex
dec
hex
> 540.0
32767
7FFF
H
> 1004.0
32767
7FFF
H
> 813.2
32767
7FFF
H
Overflow
540.0
:
400.1
5400
:
4001
1518
H
:
0FA1
H
1004.0
:
752.2
10040
:
7522
2738
H
:
1D62
H
813.2
:
673.3
8132
:
6733
1FC4
H
:
1AAD
H
Overshoot
range
400.0
:
-270.0
4000
:
-2700
0FA0
H
:
F574
H
752.0
:
-454.0
7520
:
-4540
1D60
H
:
EE44
H
673.2
:
3.2
6732
:
32
1AAC
H
:
0020
H
Rated range
< -270.0
< -2700
< F574
H
< -454.0
< -4540
<EE44
H
< 3.2
< 32
< 0020
H
Underflow
Faulty wiring (polarity reversal, or open inputs, for example), or sensor error in the negative range (wrong
type of thermocouple, for example) will cause the analog input module to signal underflow, starting at ...
... from F0C4
H
underflow and
outputs 8000
H
.
... from E5D4
H
underflow and
outputs 8000
H
.
... from FB70
H
underflow and
outputs 8000
H
.