Schweitzer Engineering Laboratories SEL-311C, Instruction Manual

Page: 372 / 748

10.10
SEL-311C Relay Instruction Manual
Date Code 20060320
Serial Port Communications and Commands
Serial Port Access Levels
Serial Port Access Levels
Commands can be issued to the relay via the serial port to view metering
values, change relay settings, etc. The available serial port commands are
listed in
Table 10.5 . The commands can be accessed only from the
corresponding access level as shown in Table 10.5 . The access levels are:
Access Level 0
Once serial port communications are established with the relay, the relay
sends the following prompt:
=
This is referred to as Access Level 0. The only command available at Access
Level 0 is the
ACC command (see Table 10.5 ).
Enter the ACC command at the Access Level 0 prompt:
= ACC <Enter>
The ACC command takes the relay to Access Level 1 (see ACC Command
(Go to Access Level 1) on page 10.14 , and 2AC and BAC Commands on
page 10.15 for more detail).
Access Level 1
When the relay is in Access Level 1, the relay sends the following prompt:
=>
Commands 2AC through TRI in Table 10.5 are available from Access
Level 1. For example, enter the MET command at the Access Level 1 prompt
to view metering data:
=> MET <Enter>
The 2AC command allows the relay to go to Access Level 2. Enter the 2AC
command at the Access Level 1 prompt:
=>
2AC <Enter>
Access Level Status
Access Level 0 lowest access level
Access Level 1 general information only
Access Level B all Level 1 commands plus breaker control commands
Access Level 2 the highest access level;
all Level B commands plus setting and test commands
NOTE
: In this manual, commands you
type appear in bold/uppercase: STATUS .
Computer keys you press appear in
bold/brackets:
<Enter> .