10.9
Date Code 20060320 Instruction Manual SEL-311C Relay
Serial Port Communications and Commands
Serial Port Automatic Messages
Serial Port Automatic Messages
When the serial port AUTO setting is Y, the relay sends automatic messages to
indicate specific conditions. The automatic messages are described in
Table 10.4.
SEL-DTA Protocol
When the serial port DTA setting is Y, the AUTO setting is hidden and forced
to Y. With DTA set to Y, the SEL-311C is compatible with the SEL-DTA2
Display Transducer Adapter.
Table 10.4 Serial Port Automatic Messages
Condition Description
Power Up The relay sends a message containing the present
date and time, Relay and Terminal Identifiers, and the
Access Level 0 prompt when the relay is turned on.
Event Trigger The relay sends an event summary each
time an event report is triggered. See
Section 12: Standard Event Reports and SER.
Group Switch The relay displays the active settings group
after a group switch occurs. See GRO n Command
(Change Active Setting Group) on page 10.35.
Self-Test Warning or Failure The relay sends a status report each time
a self-test warning or failure condition is detected. See
STA Command (Relay Self-Test Status) on page 10.29.
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