Acquisition Of Power Demand; Energy Counters - Siemens SENTRON PAC3120 Manual

Description
2.3 Average values and counters
2.3.2

Acquisition of power demand

Values that can be read out
The power monitoring devices supply the power demand of the last completed demand
period:
● Average values for active power and reactive power, separated in each case for import
and export
● Minimum and maximum within the period
● Length of the demand period in seconds. The period may be shorter due to external
synchronization.
● Time in seconds since the last synchronization or since completion of the last period
Note
The power demand can only be read out via the interface (it is not shown on the display).
The average values of the last demand period can only be retrieved during the active
demand period.
Example: Period length and length of the demand period
Period length: 15 min; time of day: 13:03; time in seconds: 180 s.
The following can be calculated from this: The last demand period ended at 13:00. The
active demand period will end at 13:15 or in 12 min.
Adjustable parameters
● Time interval in minutes: 1 to 60 min adjustable, default 15 min
● Synchronization via bus or digital input
2.3.3

Energy counters

Energy counters
The power monitoring devices have energy counters for recording
● Active energy import
● Active energy export
● Reactive energy import
● Reactive energy export
● Apparent energy
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PAC3120 and PAC3220
Equipment Manual, 10/2019, L1V30425208F-01