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5.1.5
Synchronization of the Load Profile
5.1.5.1 Types of Synchronization
At the beginning of every subperiod, SICAM Q100 expects a synchronization signal which can either be sup-
plied externally or created internally.
External supply of the synchronization signal:
•
Via one of the binary inputs
•
Via the communication interfaces
Creation of the internal synchronization signal:
•
Creation through the internal clock of the device
Synchronization with External Synchronization Pulses
Synchronization via binary inputs or communication interface
SICAM Q100 checks whether there is a deviation from the set time or whether there are no synchronization
pulses. If a set tolerance is exceeded or if the value falls below this tolerance, the measuring period is short-
ened and marked accordingly.
If the time grid of the incoming pulses is shifted, SICAM Q100 adapts to the changed time grid automatically.
Particularities in the synchronization via communication interface
The synchronization telegram transmitted via Modbus TCP or Modbus RTU contains, among other things, the
length of the subperiods in minutes.
If the set length of the subperiods in the device does not correspond to the length in the telegram, the synchro-
nization pulse is ignored. Load-profile data are still recorded though based on the internal clock of the device.
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 sub-
period.
Updating the time within the current measuring period or beyond the measuring period causes shortened mea-
suring periods and is given the information "resynchronized" in the time stamp.
Substitute values are not written for any gaps in the history.
SICAM Q100, 7KG95xx, Device Manual
E50417-H1040-C522-A4, Edition 03.2018
5 Energy Management
5.1 Load-Profile Determination
85
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