9 Troubleshooting and Maintenance
9-38
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
34C20000 hex Slave I/O
Refresh Error
The I/O memory in
the destination
CPU Unit for I/O
refreshing could not
be found when
refreshing the slave
function data in the
CPU Unit.
• I/O words are allocated in an
EM bank that does not exist.
S
page 9-48
34C30000 hex Slave User
Allocation
Area Setting
Failed
An error occurred in
the following opera-
tion for user alloca-
tion of the slave.
• The slave function is not dis-
abled.
• There is a mistake in the user
allocations to a slave.
• CPU Unit is not in PROGRAM
mode.
• More than one software switch
changed to TRUE at the same
time. Or, another software
switch changed to TRUE before
processing was completed for a
previous software switch.
S
page 9-48
64AC0000 hex Send Time-
out Error
A send timeout
occurred.
• There is no slave or other
device on the network.
• The same baud rate is not set
for all nodes.
• Communications cable lengths
(trunk line and branch lines) are
unsuitable.
• A communications cable is dis-
connected or loose.
• The terminating resistance is
somewhere other than the ends
of the trunk line.
• Noise
• There is an error in the CAN
controller.
S
page 9-49
74600000 hex Master Func-
tion
Enable/Dis-
able Failed
An operating error
occurred when
enabling or dis-
abling the master
function.
• An attempt was made to enable
the master function when it was
already enabled.
• An attempt was made to dis-
able the master function when it
was already disabled.
• CPU Unit is not in PROGRAM
mode.
• More than one software switch
changed to TRUE at the same
time. Or, another software
switch changed to TRUE before
processing was completed for a
previous software switch.
S
page 9-50
74610000 hex Master Fixed
Allocation
Area Setting
Failed
An error occurred in
one of the following
operations for fixed
allocation of the
master.
• The master function is not
enabled.
• The scan list is not disabled.
• CPU Unit is not in PROGRAM
mode.
• More than one software switch
changed to TRUE at the same
time. Or, another software
switch changed to TRUE before
processing was completed for a
previous software switch.
S
page 9-51
Event code Event name Meaning Assumed cause
Level
Reference
Maj Prt Min Obs Info
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