Date Code 20001006 Serial Port Communications and Commands 10-9
SEL-351 Instruction Manual
When the serial port AUTO setting is DTA, the SEL-351 is compatible with the SEL-DTA2 on
that port. The MET and MET D command responses are modified to comply with the DTA2 data
format for that port.
Table 10.5: 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,
Sag/Swell/Interruption Report, and SER.
Group Switch The relay displays the active settings group after a group switch
occurs. See GRO n Command (Group) in this section.
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 (Status) in
this section.
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 10.6. The commands can be
accessed only from the corresponding access level as shown in Table 10.6. The access levels are:
Access Level 0 (the lowest access level)
Access Level 1
Access Level B
Access Level 2 (the highest access level)
Note: In this manual, commands you type appear in bold/uppercase: OTTER. Computer keys
you press appear in bold/uppercase/brackets: <ENTER>.
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 that is available at Access Level 0 is the
ACC command (see Table 10.6). Enter the ACC command at the Access Level 0 prompt:
=ACC <ENTER>
Courtesy of NationalSwitchgear.com
To Next Page
Loading...
