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Synchronization via the Internal Clock of the Device
If external synchronization is not possible, for instance, due to no synchronization pulse, the synchronization
can be configured with the internal clock of the device. The length of measuring period and subperiod
depends only on the internal clock of the device.
The starting time of the subperiod is the previous full hour plus a multiple of the configured length of the
subperiod.
Updating the time within the current measuring period or beyond the measuring period causes shortened
measuring periods and is given the information resynchronized in the time stamp.
Substitute values are not written for any gaps in the history.
Special Conditions and Effects on the Load-Profile at Synchronization
Device Restart
If a functional battery is installed in the device, the existing load-profile records are kept unchanged.
Resetting the Device Clock
Resetting the device clock does not affect the load-profile recording. The historical load profiles with a date in
the future do not prevent resetting the device clock.
Failure of the Measuring Voltage:
Failure of the measuring voltage does not affect the load profile.
Failure and Return of the Supply Voltage:
When the supply voltage returns after a temporary failure, the device records shortened measuring periods.
Interpolated values are not determined and written for load-profile data which were not recorded during the
period.
Additional Information on the Load-Profile Data
The device determines the following additional information for every period (see Communication manual,
Load profile – Management):
•
LOADPROFILE_FLAG_QUALITY_SYNC
The device triggered the period end prematurely due to a synchronization irregularity. As long as the
time has not been determined, the flag is set. The time can be undefined if the battery could not buffer
the time, for example, due to discharged battery.
•
LOADPROFILE_FLAG_QUALITY_AUXPOWER_FAIL
The device triggered the period end prematurely due to supply-voltage failure.
•
LOADPROFILE_FLAG_QUALITY_UNSECURE
The load-profile data are unsafe. Reasons are:
–
Measuring current or measuring voltage are outside the specified range
–
Type of reactive power was changed
The additional information is stored with the other load-profile data and can be retrieved via the communica-
tion interfaces.
Configuration and Value View via Web Pages
Configuration of the Load Profile
To change the settings of the load profile in the Configuration tab, proceed as follows:
In the navigation window, click Load profile.
5.1.2
Energy Management
5.1 Load Profile
104
SICAM, SICAM P850/P855 7KG85X, Manual
E50417-H1040-C482-A9, Edition 03.2022
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