Siemens SIMATIC Manual page 573

External reference junction
The table below lists the codes for the external reference junction, to be entered at the
corresponding byte of data record 1.
Temperature coefficient
The table below lists the codes for the temperature coefficient, to be entered at the
corresponding byte of data record 1.
Note
When selecting a temperature coefficient by writing data record 1 via an SFC or a GSD file,
the same temperature coefficient must be specified for every channel which uses the
external reference junction. If you select different temperature coefficients, this will lead to a
parameter fault.
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
A.11 Parameters of analog input module SM 331; AI 6 x TC isolated
Selection of an external reference junction
Local thermoresistor
Remote thermoresistor
Temperature coefficient
Pt 0.003850 Ω/Ω/°C (IPTS-68)
Pt 0.003916 Ω/Ω/°C
Pt 0.003902 Ω/Ω/°C
Pt 0.003920 Ω/Ω/°C
Pt 0.003850 Ω/Ω/°C (ITS-90)
Pt 0.003910 Ω/Ω/°C (GOST)
Parameter sets of signal modules
Code
2#0
2#1
Code
2#0000
2#0001
2#0010
2#0011
2#0100
2#0101
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