14.12
SEL-400 Series Relays Instruction Manual Date Code 20171006
ASCII Command Reference
Command Description
NOTE: The SEL-487B does not
support the CLOSE command.
The CLOSE n command asserts Relay Word bit CCn. The CCn bit must be
included in the close SEL
OGIC equation for breaker n (BKnMCL) for this com-
mand to effect a close operation. The relay uses these equations and additional
relay logic to assert a control output (for example, OUT103 := BK1CL) to close a
circuit breaker.
If the circuit breaker control enable jumper BREAKER is in place, the relay
responds with
Close breaker (Y/N)?. When you answer Y <Enter> (for yes),
the relay prompts,
Are you sure (Y/N)?. If you again answer Y <Enter>, the
relay asserts the Relay Word bit for one processing interval.
If you have assigned a circuit breaker auxiliary contact (52A) to a relay control
input (based on the 52AAn, 52ABn, 52ACn settings), the relay waits 0.5 second,
checks the state of the circuit breaker, and issues either a
Breaker OPEN or
Breaker CLOSED message.
If circuit breaker control enable jumper BREAKER is not in place, the relay
aborts the command and responds,
Aborted: the breaker jumper is not
installed
. If the relay is disabled, the relay responds with Command aborted
because relay is disabled
. If Breaker n is not enabled and you issue the
CLOSE n command, the relay responds with
Breaker n is not available.
COMMUNICATIONS
The COMMUNICATIONS command displays communications statistics for
the M
IRRORED BITS communications channels and for synchrophasor client
channels. Some relays support additional options to the COM command besides
those described here.
COM c
Use the COM c command to view records of the MIRRORED BITS communica-
tions buffers for specific relay communications channels.
The c option in the COM command is A for MIRRORED BITS communications
Channel A, B for M
IRRORED BITS communications Channel B, and Channel M
for the M
IRRORED BITS communications channels in general. If both MIRRORED
B
ITS communications channels are in use, then the M option does not function
and you must specify A or B.
Ta b l e 1 4. 32 C LOS E
n
Command
Command Description Access Level
CLOSE n Command the relay to close Circuit Breaker n. B, P, A, O, 2
Ta b l e 1 4. 33 COM
c
Command
a
a
Parameter
c
is A, B, or M for Channel A, Channel B, and MIRRORED BITS communications channels,
respectively.
Command Description Access Level
COM A Return a summary report of the last 255 records in the commu-
nications buffer for MIRRORED BITS communications Channel A.
1, B, P, A, O, 2
COM B Return a summary report of the last 255 records in the commu-
nications buffer for M
IRRORED BITS communications Channel B.
1, B, P, A, O, 2
COM M Return a summary report of the last 255 records in the commu-
nications buffer for either M
IRRORED BITS communications
Channel A or Channel B when only one channel is enabled.
1, B, P, A, O, 2
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