Troubleshooting

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–3for typical troubleshooting procedures for connecting and setting up ENET communications.

Table A-1Troubleshooting for ENET – RS-485 Communication

SymptomCheckAction

 

 

 

One of the power supply units

The power supply is not turned

Turn the power supply ON.

is not responding.

on.

 

 

 

 

The communication interface is

Check that the RS-485 bus is

 

not set as a slave unit (RS-485) or

selected as the communication

 

the address has not been set

interface and the address is

 

correctly.

correct.

 

 

 

Sequentially several units are

RS-485 communication is

Check your RS-485

not responding, e.g. from #21

disconnected at the first unit that

communication. Try switching the

to end.

is not responding.

cable linking this unit to the last

 

 

unit that is known to have given a

 

 

response.

 

 

 

All of the units are not

The ENET communication is

Check the ENET communication.

responding.

disconnected.

 

 

The HyperTerminal session is not

Check the settings of the

 

configured properly.

HyperTerminal session. Follow

 

 

the instructions in the “Selecting

 

 

ENET as the Communication

 

 

Port” on page 2–17.

 

 

 

A-2

M370078-06