10.30
SEL-351A Relay Instruction Manual Date Code 20080213
Serial Port Communications and Commands
Command Explanations
The relay responds:
Reboot the relay and clear status
Are you sure (Y/N) ?
If you select N or n, the relay displays:
Canceled
and aborts the command.
If you select Y, the relay displays:
Rebooting the relay
The relay then restarts (just like powering down, then powering up relay), and
all diagnostics are rerun before the relay is enabled.
Refer to Table 13.1 for self-test thresholds and corrective actions.
TAR Command (Display Relay Element Status)
The TAR command displays the status of front-panel target LEDs or relay
elements, whether they are asserted or deasserted. The elements are
represented as Relay Word bits and are listed in rows of eight, called Relay
Word rows. The first 2 rows correspond to Table 10.7. The remaining rows
correspond to the Relay Word as described in Section 9: Setting the Relay.
A Relay Word bit is either at a logical 1 (asserted) or a logical 0 (deasserted).
Relay Word bits are used in SEL
OGIC control equations. See Section 9: Setting
the Relay and Appendix G: Setting SEL
OGIC Control Equations.
The TAR command does not remap the front-panel target LEDs, as is done in
some previous SEL relays. But the execution of the equivalent TA R command
via the front-panel display does remap the bottom row of the front-panel target
LEDs (see Figure 11.3, pushbutton {OTHER}, only applicable to models with
LCD).
The TAR command options are:
TAR Command Description
TAR n k or TAR ROW n k Shows Relay Word row number n (0–62).
k is an optional parameter to specify the number
of times (1–32767) to repeat the Relay Word row
display. If k is not specified, the Relay Word row is
displayed once. Adding ROW to the command
displays the Relay Word Row number at the start
of each line.
TAR name k or TAR ROW name k Shows Relay Word row containing Relay Word bit
name (e.g., TAR 50C displays Relay Word
Row 5). Valid names are shown in Table 10.7, in
Table 9 .5 , and in Tab le 9 .6 . k is an optional
parameter to specify the number of times
(1–32767) to repeat the Relay Word row display. If
k is not specified, the Relay Word row is
displayed once. Adding ROW to the command
displays the Relay Word Row number at the start
of each line.
Courtesy of NationalSwitchgear.com
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