Schweitzer Engineering Laboratories SEL-751 - Table 7.7 Command Response Header Definitions

7.19
Date Code 20170927 Instruction Manual SEL-751 Relay
Communications
Communications Protocols
Command Summary
The SEL-751 Relay Command Summary at the end of this manual lists the
serial port commands alphabetically. Much of the information available from
the serial port commands is also available via the front-panel pushbuttons.
Access Level Functions
The serial port commands at the different access levels offer varying levels of
control:
➤ The Access Level 0 commands provide the first layer of
security. In addition, Access Level 0 supports several
commands that SEL communications processors require.
➤ The Access Level 1 commands are primarily for reviewing
information only (settings, metering, etc.), not changing it.
➤ The Access Level 2 commands are primarily for changing relay
settings.
➤ Access Level C (restricted access level, should be used under
direction of SEL only).
The SEL-751 responds with
Invalid Access Level when a command is
entered from an access level lower than the specified access level for the
command. The relay responds with
Invalid Command to commands that are
not available or are entered incorrectly.
Header
Many of the command responses display the following header at the
beginning:
Table 7.7 lists the header items and their definitions.
[RID Setting] Date: mm/dd/yyyy Time: hh:mm:ss.sss
[TID Setting] Time Source: external
Table 7.7 Command Response Header Definitions
Item Definition
[RID Setting]: This is the RID (Relay Identifier) setting. The relay ships with the
default setting RID=751; see ID Settings on page 4.3.
[TID Setting]: This is the TID (Terminal Identifier) setting. The relay ships with
the default setting TID = FEEDER RELAY; see ID Settings on
page 4.3.
Date: This is the date when the command response was given, except for
relay response to the EVE command (event), when it is the date the
event occurred. You can modify the date display format (Month/
Day/Year, Year/Month/Day, or Day/Month/Year) by changing the
DATE_F relay setting.
Time: This is the time when the command response was given, except for
relay response to the EVE command (event), when it is the time
the event occurred.
Time Source: This is internal if no time-code input is attached and external if an
input is attached.