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-32-
No.EX##-OME0015-C
Fault No.3
Problem
Possible cause
Investigation method
Countermeasures
MAC ID
duplication error
Check that there is no MAC ID duplication
between the master and slave.
Correct the MAC ID settings.
Check that the length of the communication
cable is suitable for the communication speed,
check for terminators at both ends, and check
that the special cable for DeviceNet
TM
is used.
Correct the wiring and
settings.
Check that there is no equipment or high
voltage cables which generates noise around
the communication and power supply cables.
Separate the communication
and power supply cables
away from noise sources.
Check the DeviceNet
TM
cable connections and
check for broken wires.
Confirm that repeated bending stresses or
pulling forces are not applied to the cable which
may cause broken wire.
Correct the connection of the
DeviceNet
TM
cable.
BUS OFF error
Confirm that the SI unit communication speed
setting and the communication speed settings
of the master and slave are the same.
Correct the communication
speed settings.
SI unit
MOD/NET LED
is ON Red
Failure of the
communication
device
-
Replace the SI unit.
Fault No.4
Problem
Possible cause
Investigation method
Countermeasures
Check that the length of the communication
cable is suitable for the communication speed,
check for terminators at both ends, and check
that the special cable for DeviceNet
TM
is used.
Correct the wiring and
settings.
Check that there is no equipment or high
voltage cables which generates noise around
the communication and power supply cables.
Separate the communication
and power supply cables
away from noise sources.
Check the DeviceNet
TM
cable connections and
check for broken wires.
Confirm that repeated bending stresses or
pulling forces are not applied to the cable which
may cause broken wire.
Correct the connection of the
DeviceNet
TM
cable.
SI unit
MOD/NET LED
flashes Red
I/O connection
timeout
Confirm that power is supplied to the master
station.
Supply power to the master
station correctly.