R.9.57
Date Code 20111215 Reference Manual SEL-421 Relay
ASCII Command Reference
Description of Commands
TRIGGER
The TRIGGER command initiates data captures for high-resolution
oscillography and event reports. For information on high-resolution
oscillography and event reports, see Section 3: Analyzing Data in the
Applications Handbook. See Reading Oscillograms, Event Reports, and SER
on page U.4.42 for examples using the TRI command.
TRI
Use the TRI command to trigger the SEL-421 to record data for high-
resolution oscillography and event reports.
When you issue the TRI command, the relay responds,
Triggered. If the
event did not trigger within 1 second, the relay responds,
Did not trigger.
VERSION
The VERSION command displays the relay hardware and software
configuration.
VER
Use the VER command to list the part numbers, serial numbers, checksums,
software release numbers, and other important relay configuration
information.
When you issue the VER command, the relay displays the latest release
numbers for these items:
➤ FID
➤ Part number
➤ Serial number
➤ SELBOOT BFID
➤ Chassis orientation and size
➤ Mainboard memory types and sizes
➤ Front-panel hardware
➤ Analog inputs (W, X, Y, Z) ratings
➤ Fiber port (installed or absent)
➤ Interface board inputs and outputs
➤ Power supply ratings
➤ Communications card IDs and part number
➤ Extended relay features list (optional DNP communications
capability)
Table 9.148 TRI Command
Command Description Access Level
TRI Trigger relay data capture. 1, B, P, A, O, 2
Table 9.149 VER Command
Command Description Access Level
VER Display the hardware and software con-
figurations.
1, B, P, A, O, 2
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