Siemens SIMATIC ET 200eco PN, Operating Instructions Manual

Page: 183 / 278

Representation of analog values for thermocouple type K
Units Units Units Type K
in °C
Decimal Hexa­
decimal
Type K
in °F
Decimal Hexa­
decimal
Type K
in K
Decimal Hexa­
decimal
Range
> 1622.0 32767 7FFF
H
> 2951.6 32767 7FFF
H
> 1895.2 32767 7FFF
H
Overflow
1622.0
:
1372.1
16220
:
13721
3F5C
H
:
3599
H
2951.6
:
2501.7
29516
:
25017
734C
H
:
61B9
H
1895.2
:
1645.3
18952
:
16453
4A08
H
:
4045
H
Overrange
1372.0
:
-270.0
13720
:
-2700
3598
H
:
F574
H
2501.6
:
-454.0
25016
:
-4540
61B8
H
:
EE44
H
1645.2
:
3.2
16452
:
32
4044
H
:
0000
H
Nominal
range
< -270.0 -32768 8000
H
< -454.0 -32768 8000
H
< 3.2 -32768 8000
H
Underflow
10.1.7 Dynamic reference temperature with module 8 AI RTD/TC 8xM12
Properties
You can measure the reference junction temperature of the measuring point by using the I/O
device 8 AI RTD/TC 8xM12 or an external module from another station when you use the
compensation type "Dynamic reference temperature". To do so, the reference temperature is
transmitted with SFB 53 "WRREC" using the data record DS2 to the I/O device
8 AI RTD/TC 8xM12.
Requirements
• Standard function block SFB 53 "WRREC"
• User program
Programming
Observe the following notes on the user program:
• The permitted value range of the reference junction temperature in standard resolution
corresponds to the temperature range Pt100 Climatic for platinum RTDs.
• If a reference junction temperature is received in data record DS2 that is outside the
permitted value range, a diagnostic interrupt "Reference channel fault" is signaled if the
"Group diagnostics" parameter has been enabled.
184
ET 200eco PN
Operating Instructions, 06/2022, A5E01250250-AN
I/O device analog input/analog output
10.1 I/O device analog input