Sel SEL-421 - File Structure; Basic File Structure

R.4.8
SEL-421 Relay Reference Manual Date Code 20111215
Communications Interfaces
Communications Card
SEL-421 Ethernet card can support as many as three simultaneous FTP
sessions, allowing simultaneous FTP access to as many as three separate
users.
The host maintains the access control list that determines FTP log-in IDs and
passwords. The host also determines which files are available. Some files are
available at specific log-in levels, while other files are read-only access.
Subsequent host-specific sections describe access control for each host.
File Structure
The basic file structure common to all hosts is organized as a directory and
subdirectory tree similar to that used by Unix, DOS, Windows, and other
operating systems. The root directory is “/” and has at least one subdirectory.
The basic file structure is shown in Tab le 4.6.
The root directory contains the following files if the IEC 61850 protocol is
installed and enabled:
➤ CID (Configured IED Description) file—contains the IEC
61850 SCL configuration for the SEL-421
➤ ERR.TXT file—contains any errors found during downloading
of the CID file, and is present when the download is complete
➤ CFG.XML file—contains the Ethernet card and SEL-421
configuration information
The first subdirectory is for the host. Some hosts do not have a subdirectory.
The HOST_ID string, if set, determines this subdirectory name. The Ethernet
card strips any leading or following white-space characters. The Ethernet card
then substitutes the “_” character for any white-space or delimiter characters.
For example, if the HOST_ID is IED#983 Sub#45, then the host subdirectory
name is IED_983_Sub_45. If the converted HOST_ID is longer than 31
characters, the host subdirectory name becomes the first 31 characters of the
converted HOST_ID. The host subdirectory contains settings, reports, and
diagnostic files for the host.
The next subdirectory is SEL-2702. This subdirectory contains the file
DIAGNOSTICS.TXT that contains records for Ethernet card system failures.
The time and date for the diagnostics file are the same as the time and date of
the last system failure event. This directory will also contain the
DNPMAP.TXT and DNPMAPx.TXT files if DNP LAN/WAN is enabled. The
Table 4.6 Basic File Structure
Host Directory Subdirectories Files
/ Host See the host-specific sections for available files
and directories.
SEL-2702 DIAGNOSTICS.TXT
ERR.TXT
DD01_DeviceID REGION1.TXT
DDnn_DeviceID REGION1.CAS
•
•
•
REGIONn.TXT
REGIONn.CAS