Schweitzer Engineering Laboratories SEL-749M - Table 7.5 Command Response Header

7.9
Date Code 20080918 Instruction Manual SEL-749M Relay
Communications
SEL ASCII Protocol Details
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 required by SEL communications processors.
➤ 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.
The SEL-749M 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:
[RID Setting] Date: mm/dd/yyyy Time: hh:mm:ss.sss
[TID Setting] Time Source: external
Table 7.5 lists header item definitions:
Command
Explanations
This section lists ASCII commands alphabetically. Commands, command
options, and command variables to enter are shown in bold. Lowercase italic
letters and words in a command represent command variables that are
determined based on the application. For example, circuit breaker number
n = 1 or 2, remote bit number nn = 1–8, and level.
Command options appear with brief explanations about the command
function. Refer to the references listed with the commands for more
information on the control function corresponding to the command or
examples of the control response to the command.
You can simplify the task of entering commands by shortening any ASCII
command to the first three characters; for example, ACCESS becomes ACC.
Always send a carriage return <CR> character or a carriage return character
followed by a line feed character <CR><LF> to command the control to
Table 7.5 Command Response Header
Item Definition
[RID Setting]: This is the RID (Relay Identifier) setting. The relay is shipped with
the default setting RID = 749M; see Identifier Settings on page 4.3.
[TID Setting]: This is the TID (Terminal Identifier) setting. The relay is shipped with
the default setting
TID = MOTOR RELAY; see Identifier 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, 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.
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