Schweitzer Engineering Laboratories SEL-701, Instruction Manual

Page: 171 / 468

Date Code 20010719
701 Motor Protection Relay
ASCII Serial Port Operation
Command Explanations
6.27
=> STATUS
SEL-701 Date: 09/01/1999 Time: 16:01:28.364
MOTOR RELAY
FID=SEL-701-R102-V11xxx-Z000000-D19990730 CID=D5EE
SELF TESTS
IA IB IC IN
Offset: OK OK OK OK
VA VB VC N
Offset: OK OK OK OK
+5V_PS -5V_PS +15V_PS +28V_PS
OK OK OK OK
TEMP RAM ROM CR_RAM EEPROM
OK OK OK OK OK
BATTERY RTC LC_TIME TC_START
OK OK OK OK
Relay Enabled
=>
Figure 6.16 STATUS Command Example.
STATUS R (Level 2)
To reset the self-test status and restart the relay, use the STA R command from
Access Level 2.
The relay then restarts (just like powering down, then powering up the relay) and
all diagnostics are rerun before the relay is enabled.
STOP (Level 2)
The STOP command causes the relay to trip, opening the motor contactor or
circuit breaker and stopping the motor. The command also triggers an event report.
STR (Level 2)
The STR (Start) command initiates a motor start using the relay's internal logic.
The factory default logic configures output contact OUT3 to close to start the motor.
Refer to
Appendix B: SELogic® Control Equations & Relay Logic for information on
how to change the factory default logic.
TARGET (Level 1 or 2)
The TARGET command displays the status of 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. For additional information on individual
Relay Word bits, refer to
Appendix B: SELogic® Control Equations & Relay Logic .