R.4.17
Date Code 20111215 Reference Manual SEL-421 Relay
Communications Interfaces
Communications Card
If the Ethernet card includes the IEC 61850 protocol option and the protocol is
enabled (E61850 := Y), the ID command will display the following additional
information:
➤ iedName: the IED name (e.g., SEL-421_OtterTail)
➤ type: the IED type (e.g., SEL_421)
➤ configVersion: the CID file configuration version
(e.g., ICD-421-R100-V0-Z001001-20060512)
If the Ethernet card encounters an error while parsing the CID file, the value
of the iedName, type, and configVersion fields shall be set to “PARSE
FAILURE”; otherwise, the fields shall contain the CID file values as shown in
the examples above.
MEMORY
The MEMORY command is a diagnostic command for determining if the
Ethernet card is using onboard RAM properly. Use the MEMORY command
to display RAM statistics for the following areas: memory in use, free
memory, free memory blocks, and bytes in largest available block.
PING
When you are setting up or testing substation networks, it is helpful to
determine if the network is connected properly and if the other devices are
powered up and configured properly. Use the PING command to determine if
another node on the network is available and connected to the network. The
Ethernet card sends ping messages to the remote node until you interrupt the
Ethernet card by pressing <Enter>. Command options for the PING
command are shown in Table 4.16.
The PING command requires the addr parameter, which can either be a name
in the NAR table for the host, or an actual IP address. In response to the PING
command, the Ethernet card displays the status of each ping attempt. When
you stop the ping process, the Ethernet card displays several statistics to
summarize the ping attempts.
QUIT
To close your connection to the Ethernet card and start a connection to another
device without closing your terminal application, use the QUIT command.
For example, use QUIT to log out and automatically terminate a Telnet
session. You may then open a new Telnet session from your Telnet
application. You can also use the QUIT command to log out of the Ethernet
card for security purposes when the connection will not be closed. For
example, if you are connected to an Ethernet card in a host from one of the
host serial ports, you can log out without closing the transparent connection to
the Ethernet card.
Table 4.16 PING Command Options
Command Description
PING addr Ping the address represented by addr every second.
PING addr n Ping the address addr once every n seconds,
where n is a value from 1–255.
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