Siemens Sicam P855 7KG85 Series Device Manual page 150

7 Operation at Use of a PC
7.3 Configuration of the Device
Recording with the Trend Recorder
The trend recorder is used for recording the voltage events. This is used for the displaying in webserver and
also to be sent as PQDIF data for event evaluation over IEC 61850 protocol to PQS.
The recording of data points (voltage values with a time stamp) that have exceeded/fallen below the parame-
terized tolerance value (fault) and the associated creation of a PQDIF file is determined by two trigger criteria:
• Creation of a PQDIF file after the parameterized Maximum recording interval (for example, 24 h) has
been reached if within this interval no 1024 data points have been generated yet.
• Creation of a PQDIF file when the voltage has exceeded/fallen below the tolerance range 1024 times and
therefore 1024 data points have been generated.
Start time
Clock time
Recording time
Data points
PQDIF file
recording
NOTE
Data point: A data point is created when the voltage exceeds or falls
below the parameterized tolerance value. The data point represents
this voltage value in the PQDIF file.
Figure 7-44
150
0:00 04:00
06:50
0 1024 / 0
Recording
all 1024 data points
Trend Recorder, Function When the 24 h Interval Is Set
08:00 12:00
14:15
1024 / 0
Recording
all 1024 data points
16:00 20:00
18:45
1024 / 0
Recording
Recording all
120 data points
1024 data points
SICAM P850/P855, 7KG85xx, Device Manual
E50417-H1040-C482-A6, Edition 10.2018
24:00
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