DCB Ether Series, Руководство пользователя

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Troubleshooting
43
Other Problems
P : Can’t run the configuration program using a serial cable
connection.
S: Check that:
•
The communication parameters are set properly.
•
Disconnect and reconnect the power supply.
•
Power is available... a LED is on.
•
The terminal program is operating properly. Try a
loopback connector at the gateway end of the cable to
verify program operation and the proper COM: port.
•
The most common problems causing this symptom are
incorrect RS-232 wiring or the Windows Hyperterm
program not operating correctly.
P : Can’t drive more than three RS-485 2-wire loads.
S: Read the section on RS-422 2-wire fan-out and configure the
unit appropriately.
P : Unable to poll some addresses.
S: Read the section on modbus configuration. If port one and
port two addresses overlap, the overlaped addresses are
only sent out port one.