Date Code 20210715 SEL-2890 Instruction Manual
Troubleshooting
Technical Support
5.3
Technical Support
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Cannot establish Console session from the serial port.
Incorrect data rate The SEL-2890 has a default data rate of 19200 bps
(for firmware versions R101–R103, the default
speed is 38400 bps), 8 bits, no parity, and 1 stop
bit. If the communication settings have been previ-
ously modified, you may have to try different data
rates.
Ethernet still connected The Ethernet cable needs to be disconnected before
the serial Console session can be entered.
Entering AT+++ too slowly The serial escape command AT+++ needs to be
entered within four seconds from the “A” to the last
“+”.
Typing characters too soon after
last “+”
Wait at least three seconds after the serial escape com-
mand AT+++ is entered for the prompt to appear.
Entering AT+++ too soon after
powering up the SEL-2890
Wait at least 10 seconds after powering up the
SEL-2890 before attempting console access.
Cannot Telnet through transceiver.
UDDELAY setting is too short In order for data to be received from the IED through
the transceiver, the IED has to respond in less than the
UDDELAY time period. The data returned by the IED
would be routed, emailed, or discarded if adequate
time is not provided.
Incorrect data rate
The serial data rate or communication settings
between the IED and the
SEL-2890 may not be
matched.
Table 5.2 Troubleshooting Procedures (Sheet 2 of 2)
Possible Cause Diagnosis/Solution
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