7.36
SEL-751 Relay Instruction Manual Date Code 20170927
Communications
Communications Protocols
GROUP Command
Use the GROUP command (see Table 7.1 9) to display the active settings
group or try to force an active settings group change.
When you change the active group, the relay responds with a confirmation
prompt:
Are you sure (Y/N)? Answer Y <Enter> to change the active
group. The relay asserts the Relay Word bit SALARM for one second when
you change the active group.
If any of the SEL
OGIC control equations SS1–SS3 are set when you issue the
GROUP n command, the group change fails. The relay responds:
Command
Unavailable: Active setting group
SELOGIC equations have
priority over the GROUP command
.
HELP Command
The HELP command (see Table 7 .20) gives a list of commands available at
the present access level. You can also get a description of any particular
command; type HELP followed by the name of the command for help on
each command.
=>>GOO S 1 L
SubsID 1
-----------------------------------------------------------------------------
Ctrl Ref: SEL_451_1CFG/LLN0$GO$GooseDSet15
AppID : 4116
From : 03/06/2017 18:54:16.255 To: 03/06/2017 18:57:39.950
Accumulated downtime duration : 0000:00:00.000
Maximum downtime duration : 0000:00:00.000
Date & time maximum downtime began :
Number of messages received out-of-sequence(OOS) : 0
Number of time-to-live(TTL) violations detected : 0
Number of messages incorrectly encoded or corrupted: 0
Number of messages lost due to receive overflow : 0
Calculated max. sequential messages lost due to OOS: 0
Calculated number of messages lost due to OOS : 0
# Date Time Duration Failure
=>>
Figure 7.26 GOOSE Command Response (Continued)
Ta b l e 7.19 GRO U P Com m a n d
Command Description Access Level
GROUP Displays the active settings group. 1
GROUP n Changes the active group to Group n.2
Parameter
n Parameter n indicates group numbers 1–4.
Ta b l e 7. 20 HEL P Co m m an d
Command Description Access Level
HELP Displays a list of each command available at the
present access level with a one-line description.
1
HELP command Displays information on the command command.1
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