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Troubleshooting
A-2 M370078-06
Troubleshooting for ENET – RS-485 Communication
This section describes specific troubleshooting for the combined
ENET – RS-485 communication only.
See “Troubleshooting for ENET Communication” on page A–3 for
typical troubleshooting procedures for connecting and setting up ENET
communications.
Table A-1
Troubleshooting for ENET – RS-485 Communication
Symptom Check Action
One of the power supply units
is not responding.
The power supply is not turned
on.
The communication interface is
not set as a slave unit (RS-485) or
the address has not been set
correctly.
Turn the power supply ON.
Check that the RS-485 bus is
selected as the communication
interface and the address is
correct.
Sequentially several units are
not responding, e.g. from #21
to end.
RS-485 communication is
disconnected at the first unit that
is not responding.
Check your RS-485
communication. Try switching the
cable linking this unit to the last
unit that is known to have given a
response.
All of the units are not
responding.
The ENET communication is
disconnected.
The HyperTerminal session is not
configured properly.
Check the ENET communication.
Check the settings of the
HyperTerminal session. Follow
the instructions in the “Selecting
ENET as the Communication
Port” on page 2–17.