Section 8 1MAC309294-MB F
Recording functions
416 RER620
Technical Manual
One complete disturbance recording consists of two COMTRADE file types: the
configuration file and the data file. The file name is the same for both file types. The
configuration file has .CFG and the data file .DAT as the file extension.
Figure 218: Digital fault recorder file naming
The naming convention of 8+3 characters is used in COMTRADE file naming. The file
name is composed of the last two octets of the relay's IP number and a running counter,
which has a range of 1...9999. A hexadecimal representation is used for the IP number
octets. The appropriate file extension is added to the end of the file name.
8.1.2.3 Deletion of recordings
There are several ways to delete disturbance recordings. The recordings can be deleted
individually or all at once.
Individual disturbance recordings can be deleted with the PCM tool or any appropriate
computer software, which can access the relay's C:\COMTRADE folder. The disturbance
recording is not removed from the relay memory until both of the corresponding
COMTRADE files, .CFG and .DAT, are deleted. The user may have to delete both of the
files types separately, depending on the software used.
Deleting all disturbance recordings at once is done either with the PCM tool or any
appropriate computer software, or from the LHMI via the Clear/Disturbance records
menu. Deleting all disturbance recordings at once also clears the pre-trigger recording in
progress.
8.1.2.4 Storage mode
The digital fault recorder can capture data in two modes: waveform and trend mode. The
user can set the storage mode individually for each trigger source with the Storage mode
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