Siemens SIMATIC S7-1500 Manual page 54

Parameter data records
B.1 Parameter assignment and structure of the parameter data records
Data record structure
The example in the following figure shows the structure of data record 0 for channel 0. The
structure of channels 1 to 3 is identical. The values in byte 0 and byte 1 are fixed and may
not be changed.
Enable a parameter by setting the corresponding bit to "1".
Figure B-1
54
Structure of data record 0: Bytes 0 to 6
Analog Input Module AI 4xU/I/RTD/TC ST (6ES7531-7QD00-0AB0)
Manual, 09/2016, A5E32366209-AC