Schweitzer Engineering Laboratories SEL-421-4 - Page 1242

14.36
SEL-400 Series Relays Instruction Manual Date Code 20171006
ASCII Command Reference
Command Description
LOOP DATA
The LOOP DATA command tells the relay to pass input MIRRORED BITS com-
munications data through to the receive (RMB) bits, as in the nonloopback mode.
The relay ignores received values if you do not specify the DATA option. You
can enter the options in any order.
LOOP R
The LOOP R command terminates the loopback condition on MIRRORED BITS
communications channels in loopback. If you do not specify a Channel c, then
the relay disables loopback on both channels. If you specify a channel, you can
enter the options in any order.
MAC
The MAC command returns the Media Access Control (MAC) addresses of the
Ethernet ports.
A sample MAC command response for a relay with dual copper Ethernet ports is
shown in Figure 14.7.
Table 14.81 LOOP DATA Command
Command Description Access Level
LOOP DATA Begin loopback of a single MIRRORED BITS communica-
tions channel (either Channel A or Channel B) for 5 min-
utes: pass input data to receive data as in nonloopback mode.
P, A, O, 2
LOOP c DATA Begin loopback of M
IRRORED BITS communications
Channel c only for 5 minutes: pass input data to receive
data as in nonloopback mode.
P, A, O, 2
LOOP c DATA t Begin loopback of M
IRRORED BITS communications
Channel c only for t minutes: pass input data to receive
data as in nonloopback mode.
P, A, O, 2
Table 14.82 LOOP R Command
Command Description Access Level
LOOP R Cease loopback on all MIRRORED BITS communications
channels. (Reset the channels to normal use.)
P, A, O, 2
LOOP c R Cease loopback on M
IRRORED BITS communications
Channel c. (Reset Channel c to normal use.)
P, A, O, 2
Table 14.83 MAC Command
Command Description Access Level
MAC Display all Ethernet ports MAC addresses 1, B, P, A, O, 2
=>>MAC <Enter>
Port 5-1 MAC Address: 01-30-A7-00-F2-SA
Port 5-2 MAC Address: 01-30-A7-00-F2-9B
Figure 14.7 Sample MAC Command Response