7-12
Serial Port Communications and Commands
Date Code 20020129
SEL-387E Instruction Manual
Many commands can be executed from Access Level B for viewing relay information and
controlling the breaker. While in Access Level B, any of the commands available in the lower
Access Levels 0 and 1 can be executed.
Access Level 2
After you issue the
2AC
command and enter the password, if it is required [see
PAS (Passwords)
for default factory passwords], the relay pulses the ALARM contact and will be in Access
Level 2. The Access Level 2 prompt appears (=>>).
This is the highest access level. All commands listed in this manual, for any access level, can be
executed from Access Level 2 for viewing relay information, controlling the breaker, and
changing settings. Firmware upgrades to Flash memory (see
Appendix B: SEL-300 Series
Relays Firmware Upgrade Instructions
) are also performed from this level.