Energy counters
7.3 Starting and and stopping energy meters
Analog input module AI Energy Meter 480VAC/CT HF (6ES7134-6PA00-0CU0)
Manual, 07/2018, A5E42674880-AA
63
Procedure for module version with 2 bytes of output data
If you use the module version with 2 bytes of output data, always apply the start values
the energy counters and overflow counters.
● Set the reset bit (Bit 7) in byte 1 of the output data.
Figure 7-7 Reset bit for all energy and overflow counters
If there is an edge change of the reset bit from 0 -> 1, the module resets
energy and
overflow counters to their start values.
Starting and and stopping energy meters
There are two ways of starting or stopping measurement with the energy meter AI Energy
Meter HF:
● Counting with gate
The module starts counting when you set the DQ bit for the counter gate in the output
data using an edge change from 0 -> 1. If you reset the DQ bit using an edge change
from 1 -> 0, the counter stops.
● Counting without gate
The module starts counting immediately as soon as the module is switched on. Counting
cannot be stopped.
Both options are described in the following sections.
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