Siemens SENTRON PAC2200, Product Manual, Page: 23 / 130

Description
2.3 Averaging measured values
PAC2200
Equipment Manual, 12/2019, L1V30415167B-03
21
2.3 Averaging measured values
With appropriate load profiles, consumers can carry out a targeted optimization of their
energy consumption.
Instantaneous values are averaged over specific time periods to create load profiles. For this
purpose, measured values are read out via the communication and stored. This increases
the bus load considerably and occupies storage capacity.
The PAC2200 device has two average value generators, which can be parameterized
independently.
The aggregation of the measured values reduces the bus load without risk of loosing
information. Average values are calculated contiguously, based on the underlying values.
After expiry of the set time period, the values are updated each time.
● The default setting for average value 1 is a period of 10 seconds.
● The default setting for average value 2 is a period of 15 minutes.
The period length can be set to anything between 3 seconds and 31536000 seconds (1
year).
This function is only available if communication interfaces via Modbus TCP/RTU are used.
The list of available measured values can be found in chapter Modbus-measured variables
with function code "0x14" (Page 102).
2.3.1 Acquisition of power demand
Values that can be read out
● The PAC2200 measuring device supplies the power demand of the last completed
measuring period:
● Mean values for active and reactive power, separately for import and export.
● Minimum and maximum active power and reactive power within the last measuring
period.
● Length of the measuring period in seconds. The period may be shorter for reasons of
external synchronization.
● Time in seconds since the last synchronization or since completion of the last period.
Example: Period length and length of the measuring period:
Period length: 15 minutes; time of day: 13:03; time in seconds: 180 s.