Network Problems And Repairing; Table 7-1 Network Problems And Repairing (Concerning Unstable Communications) - Hitachi FL.NET User Manual

7 TROUBLESHOOTING

7.2 Network Problems and Repairing

(1) Network problems and remedies (concerning unstable communications)

Table 7-1 Network Problems and Repairing (Concerning Unstable Communications)

Inspection
Problem
item
Communi- Transmission
cation cannot path
be
established
or is
unstable.
Communica-
ting-station
device setup
Inspection procedure
Check that all the stations properly
respond to the Ping command.
Check whether the collision lamp
frequently glows.
Check that the repeater power supply is
ON.
Check that the network IP address is
properly set.
Check that the device station number is
properly set.
Check that the device parameters are
properly set.
Check whether the CD (carrier
detection) lamp glows steadily or
intermittently.
Check whether the COM lamp glows
steadily or intermittently.
Check the power supplies and cables of
stations that fail to respond.
Check that the cables and connectors are not
in poor contact. With an analyzer, identify
abnormalities.
Check for a faulty power supply,
disconnected power cable, and improper
voltage.
With the support tool and analyzer, ensure
that the IP address setting is correct.
With the support tool and analyzer, ensure
that the station number setting is correct.
With the support tool, ensure that the device
parameter settings are correct.
Ensure that the communication cable, hub
power supply, and other items are normal.
Ensure that the device settings are correct.
7-4
Remedy