Siemens SIMATIC ET 200SP Manual page 40

Energy counters
7.3 Evaluating energy counters
If you deselect the "Enable gate control for the energy counter" parameter in the
configuration of the AI Energy Meter 400VAC ST, the energy counters operate
independently of the DQ bit as long as the current value lies above the configured "Low limit
for measuring current".
Figure 7-2
Set and reset start value
The counters can be set to their start value via the output data of each user data variant.
With energy counters, you have to reset the bit of the energy counter in control byte 2 of the
data record 143.
You can reset each energy counter to the start value or also specify a new start value via the
data record 143. You define the moment for updating of the start values in the data record
143 and in Control byte 1 in the user data. Start values are either applied immediately or
after a reset bit has been set from 0 to 1.
You can find a detailed description for this in section Data record for energy counter (DS
143) (Page 49).
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Gate disabled
Analog input module AI Energy Meter 400VAC ST (6ES7134-6PA01-0BD0)
Manual, 10/2017, A5E36061895-AB