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Analog modules
5.4 Representation of analog values
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
197
Representation of analog values for thermocouples type J
Table 5- 24 Representation of analog values for thermocouples type J
Type J in °C Unit
decimal
Unit
hexa-
decimal
Type J in °F Unit
decimal
Unit
hexa-
decimal
Type J in K Unit
decimal
Unit
hexa-
decimal
Range
> 1450,0 32767 7FFF
H
> 2642,0 32767 7FFF
H
> 1723,2 32767 7FFF
H
Overflow
1450,0
:
1201,0
14500
:
12010
38A4
H
:
2EEA
H
2642,0
:
2193,8
26420
:
21938
6734
H
:
55B2
H
1723,2
:
1474,2
17232
:
14742
4350
H
:
3996
H
Overshoot
range
1200,0
:
-210,0
12000
:
-2100
2EE0
H
:
F7CC
H
2192,0
:
-346,0
21920
:
-3460
55A0
H
:
F27C
H
1473,2
:
63,2
14732
:
632
398C
H
:
0278
H
Nominal range
< -210,0 < -2100 <F7CC
H
< -346,0 < -3460 <F27C
H
< 63,2 < 632 < 0278
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 ...
... F31C
H
, and to output 8000
H
. ... EA0C
H
, and to output 8000
H
. ... FDC8
H
, and to output 8000
H
.
Representation of analog values for thermocouples type K
Table 5- 25 Representation of analog values for thermocouples type K
Type K in
°C
Unit
decimal
Unit
hexa-
decimal
Type K in
°F
Unit
decimal
Unit
hexa-
decimal
Type K in K Unit
decimal
Unit
hexa-
decimal
Range
> 1622,0 32767 7FFF
H
> 2951,6 32767 7FFF
H
> 1895,2 32767 7FFF
H
Overflow
1622,0
:
1373,0
16220
:
13730
3F5C
H
:
35A2
H
2951,6
:
2503,4
29516
:
25034
734C
H
:
61CA
H
1895,2
:
1646,2
18952
:
16462
4A08
H
:
404E
H
Overshoot
range
1372,0
:
-270,0
13720
:
-2700
3598
H
:
F574
H
2501,6
:
-454,0
25016
:
-4540
61B8
H
:
EE44
H
1645,2
:
0
16452
:
0
4044
H
:
0000
H
Nominal range
< -270,0 < -2700 < F574
H
< -454,0 < -4540 <EE44
H
< 0 < 0 < 0000
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 ...
... F0C4
H
, and to output 8000
H
. ... E5D4
H
, and to output 8000
H
. ... FB70
H
, and to output 8000
H
.
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