Date Code 20080110 Communications 7-11
SEL-387E Instruction Manual
SEL Compressed ASCII Protocol
SEL Compressed ASCII protocol provides compressed versions of some of the relay ASCII
commands. SEL Compressed ASCII protocol is always available on any serial port. The
protocol is described in Appendix E: Compressed ASCII Commands.
SEL
Fast Meter
Protocol
SEL Fast Meter protocol supports binary messages to transfer metering messages. SEL Fast
Meter protocol is always available on any serial port. The protocol is described in Appendix D:
Configuration, Fast Meter, and Fast Operate Commands.
SEL
Fast Operate
Protocol
SEL Fast Operate protocol supports binary messages to control Relay Word bits. SEL Fast
Operate protocol is available on any serial port. Turn it off by setting FAST_OP = N, a SET P
setting. The protocol is described in Appendix D: Configuration, Fast Meter, and Fast Operate
Commands.
SEL Fast SER Protocol
SEL Fast SER protocol provides SER events to an automated data collection system. SEL Fast
SER protocol is described in Appendix F: Unsolicited SER Protocol.
SEL ASCII P
ROTOCOL
D
ETAILS
The following software protocol is designed for manual and automatic communications.
1. All commands received by the relay must be of the form:
<command><CR> or <command><CR><LF>
A command transmitted to the relay should consist of the following:
• A command followed by either a carriage return or a carriage return and line feed.
• You must separate arguments from the command by spaces, commas, semicolons,
colons, or slashes.
• You may truncate commands to the first three characters. EVENT 1 <Enter> would
become EVE 1 <Enter>.
• Upper and lower-case characters may be used without distinction, except in passwords.
2. The relay transmits all messages in the following format:
<STX><CR><LF>
<MESSAGE LINE 1><CR><LF>
<MESSAGE LINE 2><CR><LF>
.
.
<LAST MESSAGE LINE><CR><LF>
<ETX> <PROMPT>
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