Siemens SIMEAS R-PMU Manual page 93

The CDR calculates the arithmetic mean using the averaging time.
The Event Recorder collects the data records in an event-controlled manner, independent of
any recording time.
The values recorded by the CPR, CFR, CRR and CQR continuous recorders are determined on
the basis of the measured cycle. This also applies to frequency measured values, however,
these values are not determined for each channel but for all VCDAUs, VDAUs and CDAUs
groups. The frequency of the signal with the best signal quality (THD: total harmonic distortion)
within the measured value group is used for this purpose.
Every continuous recorder can be activated separately. The memory space is organized as a
ring buffer and when the parameterized maximum size is reached, the oldest records are auto-
matically overwritten.
Note
Records must be transferred cyclically to OSCOP P to avoid loss of continuous recorder
data. For more information, refer to the OSCOP P manual.
Note
The required memory space depends on how the DAU has been equipped. After the DAU
parameters of the device have been changed, the data of all recorders will be deleted by the
SIMEAS R-PMU. This is why the data must be backed up before changing the DAU
configuration or the recorder sizes.
The continuous recorders have a parameterizable recording interval (cycle time or averaging
time). The collected data of the recorder is continuously transmitted from the DAUs to the CPU
and buffered in the cache. The contents of the cache memory are written in the flash memory
every 10 minutes.
If the operator switches the device OFF before 10 minutes have elapsed or the external power
supply malfunctions, the data that is not yet in the flash memory will be lost.
Note
A battery-buffered power supply unit that can be optionally delivered ensures a safe data
backup even in case of a power supply failure.
Quality tracks
Status information is evaluated with the OSCOP P evaluation and parameterization software and
presented in the form of a diagram with eight tracks under the designation "Quality tracks". The
meaning of this status information is described in chapter 7.2.1.1. The quality tracks can be
recorded with all long-term recorders that are described in the following chapters 7.3.1 and 7.3.5.
Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012
7
7.3 Continuous Recorder
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