5.22
SEL-551 Relay Instruction Manual Date Code 20110408
Serial Port Communications and Commands
Command Explanations
TRI Command (Trigger)
Issue the TRI command to generate an event report:
=>TRI <Enter>
Triggered
=>
See Section 7: Standard Event Reports and SER for more information on
event reports.
Access Level 2
Commands
CLO Command (Close)
The CLO (Close) command asserts the CLOSE Relay Word bit, which can be
programmed to an output contact to close circuit breakers. See Figure 3.14.
To issue the CLO command, enter the following:
=>>CLO <Enter>
Close Breaker (Y/N) ? Y <Enter>
Are you sure (Y/N) ? Y <Enter>
=>>
Typing N <Enter> after either of the above prompts will abort the command.
The CLO command is supervised by main board jumper JMP24. If the jumper
is not in place (jumper JMP24 = off), the relay does not execute the CLO
command and responds:
Aborted: No Breaker Jumper
CON Command (Control)
The CON command is a two-step command that allows you to control Relay
Word bits RB1–RB8 (see Figure 3.3). At the Access Level 2 prompt, type
CON, a space, and the number of the bit you wish to control (1–8). The relay
responds by repeating your command followed by a colon. At the colon, type
the Control subcommand you wish to perform (see Table 5 .7).
The following example shows the steps necessary to pulse Remote Bit 5
(RB5):
=>>CON 5 <Enter>
CONTROL RB5: PRB 5 <Enter>
=>>
You must enter the same remote bit number in both steps in the command. If
the bit numbers do not match, the relay responds:
Invalid Command
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