Data Recorder Burst Data - Siemens US2:9810T24V User Manual

Power quality
Burst data logging is analogous to continuous shooting mode or "burst mode" in photography. An
understanding of pre and post event data assists in the analysis of undesired power quality events
such as sags or swells.
Burst logging is typically used for high-speed RMS (half-cycle) data capture, but the data recorder
supports standard speed (1-second) recording as well, depending on the ION modules connected
to the inputs of the Data Recorder module.
NOTE: To maximize the performance of your power management system, it is recommended
that devices be connected directly to an Ethernet network.

Data recorder burst data

The meter's Data Recorder modules support burst data logging.
The Data Recorder module's Pre-trigger Records setup register specifies how many pre-event
records are saved with each triggered recording. The Post-trigger Records setup register
specifies how many post-event records are saved with each triggered recording.
Both Pre-trigger Records and Post-trigger Records are set to zero by default. To configure the
data recorder for burst data logging, either or both of these setup registers must be set to a non-
zero positive integer value.
The data log set for each triggered recording is equal to the sum of Pre-trigger Records + Post-
trigger Records + 1 (where 1 is the actual record when the Data Recorder module's Record input
was triggered).
For example, if Pre-trigger Records is set to 10 and Post-trigger Records is set to 5, the number of
records for each data log set is 16:
Burst data log set = [pre-trigger records] + [post-trigger records] + [actual trigger record] = 10 + 5 +
1 = 16.
When burst data logging is enabled, both Buffer Depth and Depth setup registers must be set to a
positive integer multiple of the data log set.
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9810 series - User manual
7EN05-0390-08