Siemens simatic et200sp Manual page 45

Example
The following figure shows the effect of initial value, reset and start/stop parameters with
activated gating using the energy counter as an example:
①
The counter is reset to the value specified in the configuration. The gate is closed. The counter does not count.
②
The gate is opened via the control byte 1 in the output data of the user data variant. The counter counts.
③
The configured current low limit has been violated. The counter does not count.
④
The gate is closed. The counter does not count. A new start value is written to the measured value data record 143
with the WRREC instruction.
⑤
The gate is opened again via the control byte 1 in the output data of the user data variant. The counter counts with
the new start value.
⑥
The counter is reset via the control byte 1 in the output data of the user data variant. The counter counts from the
new start value that was transferred via the measured value data record 143.
See also
Evaluate energy counter and overflow counter (Page 47)
Analog input module AI Energy Meter 480VAC ST (6ES7134-6PA20-0BD0)
Manual, 12/2015, A5E36061895-AA
Energy counters
7.1 How the energy meter works
45