5.19
Date Code 20110408 Instruction Manual SEL-551 Relay
Serial Port Communications and Commands
Command Explanations
After the STA command is entered, the relay replies with the following status
report:
FEEDER 1 Date: 03/05/96 Time: 14:17:01.359
STATION A
FID=SEL-551-R100-Vr-D960226 CID=00FF
SELF TESTS
W=Warn F=Fail
IA IB IC IN MOF
OS 3 5 3 3 0
+5V_PS +5V_REG -5V_REG +10V_PS -10V_PS VBAT
PS 5.03 5.03 -5.03 10.35 -10.20 2.82
TEMP RAM ROM CR_RAM EEPROM
27.6 OK OK OK OK
Relay Enabled
=>
STA Command Row and Column Definitions
The relay latches all self-test warnings and failures in order to capture
transient out-of-tolerance conditions. To reset the self-test statuses, use the
STA C command from Access Level 2:
=>>STA C <Enter>
The relay responds:
Reboot the relay and clear status
Are you sure (Y/N) ?
Relay Response Definition
FID
FID
is the firmware identifier string. It identifies the firmware
revision.
CID
CID
is the firmware checksum identifier.
OS
OS
= Offset; displays measured dc offset voltages in millivolts
for the current channels. The MOF (master) status is the dc
offset in the A/D circuit when a grounded input is selected.
PS
PS
= Power Supply; displays power supply voltages in Vdc for
the power supply outputs. The +5V_REG and –5V_REG are
regulated voltages for the A/D circuit.
VBAT displays the Real
Time Clock battery voltage.
TEMP
Displays the temperature in degrees Celsius. The
temperature sensor is an output of the voltage reference
in the A/D circuitry.
RAM, ROM,
CR_RAM (critical
RAM), and EEPROM
These tests verify the relay memory components. The columns
display
OK if memory is functioning properly; the columns
display
FAIL if the memory area has failed.
W (Warning) or F (Failure) is appended to the displayed value
to indicate an out-of-tolerance condition.
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