Figure 18: ENVIS.Daq - aggregation configuration defines how instrument evaluates average, minimum and
maximum actual values for display and communication.
Time Zone
— must be set according to the local requirements. The configuration is important for correct
interpretation of the local time for tariff, for remote communication etc.
Summer Time
— if set the calendar automatically adjusts itself to the change of the local time according
to the season.
2.5.3
Aggregation (averaging, fig. 18)
This configuration influences algorithms used for calculation of special ModBus registers of the aggregated values.
In instruments with graphical display it also influences how aggregated (AVG) values are displayed. Parameters
are defined separately for primary quantities - voltages, currents and frequency, for derived quantities and
specially for PavgMax. Correctly configured aggregation in an istrument allows in connection with ENVIS
software to evaluate quarter-hour or hour maximal demand (power).
2.5.4
Communication (fig. 19)
Device is always equipped with an USB slave port for parametrization and data acquisition. Optionally it can
be equipped with RS485 or Ethernet interface.
Instrument Address
- assign unique address to each instrument on the same serial line.
COM1
Communication Speed
— speed (baud rate) of the communication line. Default value is 9600 bps.
Communication Protocol
— to be chosen between KMB protocol and ModBus RTU.
Parity
— odd, even or none. Defines behavior of the parity bit control settings.
Data bits
— defines number of data bits.
Stop bits
— defines number of re-synchronization bits after each sent character.
19
