Siemens SIMATIC S7-1500 Manual page 25

Data record structure
The following figure shows the structure of the data record 0.
● A fixed bit pattern is entered in byte 0. It indicates the version of the data record structure.
Each time a data record is written, the module checks the written data and accepts only
data records with major version 1.
● Byte 1 specifies the maximum data length that can be used for parameter data.
● Byte 2 contains the parameter data.
● Bytes 3 to 11 are reserved.
To enable a parameter in byte 2, set the corresponding bit to "1". The corresponding
diagnostics is then activated, for example, for supply voltage monitoring. If you set the
corresponding bit to "0", the diagnostics is deactivated.
You are not permitted to change byte 0, byte 1 or bytes 3 to 11.
Figure B-1
Power supply module PS 60W 24/48/60VDC HF (6ES7505-0RB00-0AB0)
Manual, 01/2019, A5E39450002-AB
Structure of data record 0
Parameter data record
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