10.2
SEL-2032 Communications Processor Instruction Manual Date Code 20120126
Testing and Troubleshooting
Self-Tests
Self-Tests
The SEL-2032 continually runs the following self-tests. Any test failure
causes an alarm to be latched and the status report to be issued on Port F.
RAM. The SEL-2032 continually performs read-write test of RAM, both
local and shared.
Code Flash. The SEL-2032 continually computes and checks a checksum
of ROM.
EEPROM/Archive Flash. The SEL-2032 continually validates data blocks
using checksums.
Power Supply. Threshold comparators (+/– 15 V) are continually checked
for tolerance.
Troubleshooting
Power
System Problems
Table 10.2 describes typical SEL-2032 power system problems and solutions.
Communications
Problems
Refer to Table 10.3 for troubleshooting some basic communications problems.
Table 10.2 Power System Problems
Symptom Probable Cause Corrective Action
All front-panel LEDs
remain dark when LED
TEST button is pressed.
No power to
rear-panel power terminals.
Internal power
supply defective.
Supply power to
rear-panel power terminals.
Remove power
and contact the factory.
+5 Vdc not supplied
to pin 1 of rear-panel
communication port(s).
Jumper(s) not
installed on main board.
See Jumper Settings on
page 2.1.
Table 10.3 Communications Problems (Sheet 1 of 2)
Symptom
SEL-2032 does not communicate with PC.
Probable Cause
Serial cable damaged or wrong cable connected.
Corrective Action
Inspect the cabling for damage and proper connection.
Symptom
SEL-2032 does not communicate with PC.
Probable Cause
SEL-2032 baud rate default jumper installed.
Corrective Action
1. Set the PC terminal to 2400 baud to communicate with the
SEL-2032.
2. Using the SET command, set the SEL-2032 baud rate.
3. Access the main board. Refer to Jumper Settings on page 2.1.
4. Remove jumper J17 A. Place the jumper on one pin of the
connector for safekeeping.
5. Set the baud rate of the PC terminal to match the SEL-2032.
6. Cycle SEL-2032 power and reconnect.
Courtesy of NationalSwitchgear.com
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