Date Code 20010731 Serial Port Communications and Commands 8-9
SEL-352-1, -2 Instruction Manual
SEL ASCII PROTOCOL DETAILS
Automatic Messages
The SEL-352 Relay generates automatic messages and sends them out the serial port(s) with the
SET P setting AUTO = Y. Four different automatic messages can be displayed:
Relay startup message
Setting group change message
Relay self-test warning or failure
Event summary message
Startup Message
Immediately after power is applied, the relay transmits the following automatic message:
EXAMPLE CIRCUIT BREAKER Date: 11/09/96 Time: 13:17:39.122
SEL-352-1
=
Group Switch Message
The SEL-352 Relay has three different setting groups for the SET settings. The active group is
selected by the group variable or the SS1 and SS2 bits. When either of these change the active
group, the following automatic message is generated.
EXAMPLE CIRCUIT BREAKER Date: 11/09/96 Time: 13:39:07.560
Active Group = 2
Group Variable = 1
=>>
TRMID setting for the new active group
Date and time of group change
Active setting group now being used
Group variable last set by the GRO command (the SET G settings SS1 and SS2 take
precedence over the GRO command)
Status Report
The relay automatically generates a status report whenever the self-tests declare a failure state
and some warning states. Refer to Self-Testing Alarms in Section 6: Metering and Monitoring
for a summary table of the self-tests. Section 6 provides a complete description of the status
report.
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