14.44
SEL-400 Series Relays Instruction Manual Date Code 20171006
ASCII Command Reference
Command Description
PORT
The PORT command can be used to connect to a remote relay.
PORT
p
The PORT p command connects a relay serial port to another device through a
virtual terminal session.
NOTE: The BAY1 and BAY2 options
only apply to relays that support 87L
communications and have the
corresponding bay card installed.
In the relay, serial port virtual terminal capability is available in MIRRORED BITS
communications. You must have previously configured the serial port for M
IR-
RORED BITS communications operation, set port setting MBNUM less than 8, and
have at least one virtual terminal session available (set MBNUMVT to 0 or
greater). Choosing MBNUMVT to 0 uses virtual terminal within the synchroni-
zation channel only. See SEL M
IRRORED BITS Communication on page 15.31 for
information on the M
IRRORED BITS communications protocol.
When the relay establishes a connection, the relay responds, Transparent ses-
sion to Port p established
. To quit the transparent connection, type the con-
trol string that you specify in port setting TERSTRN; the default is <Ctrl+E>.
Only one transparent port connection to each M
IRRORED BITS communications
port is possible at one time. If you issue a PORT p command when the selected
session is already active, the relay responds,
Transparent session already in use.
If you issue the PORT p command to ports 1, 2, 3, or F or BAY1 or BAY2 (87L
ports) and you have not properly configured the M
IRRORED BITS communica-
tions port, the MBNUMVT is not set to 1 or larger,
Invalid destination port.
PORT KILL
n
It is possible to forcefully disconnect a transparent session from another port (a
port not involved in the present transparent connection) by using the PORT
KILL n command (shown in Table 14.102).
The port parameter n can refer to either of the ports involved in the session you
want to kill. When you issue the PORT KILL n command, the relay responds,
Kill connection between ports m and n (Y/N)? Answer Y <Enter> to ter-
minate the connection. The relay sends a character sequence to the remote relay
(to make sure the remote device is left in a known state) and responds,
Connec-
tion between ports m and n disconnected
.
Ta b l e 1 4.1 0 1 P ORT
p
Command
Command Description Access Level
PORT p
a
a
Parameter
p
is 1, 2, 3, and F to indicate Communications PORT 1 — PORT 3 and PORT F, or BAY1 or
BAY2 for 87L ports.
Connect to a remote device through Port p (over MIRRORED
BITS communications virtual terminal mode).
1, B, P, A, O, 2
Table 14.102 PORT KILL
n
Command
Command Description Access Level
PORT KILL n
a
a
Parameter
n
is 1, 2, 3, or F or BAY1 or BAY2 (for 87L ports) to indicate communications PORT 1–3
or PORT F;
n
is not the present port.
Terminate the virtual terminal connection with a remote
device through port n by using a port not involved in the
connection.
P, A, O, 2
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