Siemens SIMATIC ET 200SP Manual page 53

Control information
When data record 143 is written with the WRREC instruction, Bytes 2 to 7 are used as
phase-specific control information for energy counters. The length of the control information
amounts to 2 bytes for each phase:
● In Control byte 1 you determine how you reset the counter and the time at which the
counter is reset.
● In Control byte 2 you determine which energy counter you want to reset.
Figure 7-9
Analog input module AI Energy Meter 400VAC ST (6ES7134-6PA01-0BD0)
Manual, 10/2017, A5E36061895-AB
Control information DS 143 (write access)
7.5 Data record for energy counter (DS 143)
Energy counters
53