Siemens Simatic ET 200MP Manual page 50

Parameter data records
B.3 Structure of the parameter data records Counting mode
Figure B-3 Structure of data record 0: Bytes 5 to 17
Keep in mind that the counter is stopped and reset to the start value when you change count
parameters.
Changing the parameters "Diagnostics" and "Hardware interrupts" does not have an effect
on the counter.
Structure of data records 2 to 31
The structure of data records 2 to 31 for channels 2 to 31 is identical to the structure in the
DI mode, see section Structure of the parameter data records DI mode (Page 46), figure
Structure of data record 0: Bytes 0 to 3.
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DI 32x24VDC HF digital input module (6ES7521-1BL00-0AB0)
Manual, 09/2016, A5E03485935-AF