9 Troubleshooting and Maintenance
9-20
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
*1 The 7-segment indicator will alternate between the Unit's node address and the code given in the tables in this section.
Indicators Error
category
Error Likely cause DeviceNet Unit
response
Error
log
(Hex)
MS NS 7-seg-
ment
*1
-
Red (lit)
F0 Network Node
address
duplication
The master's node
address is duplicated on
another node.
• The Unit will go offline
and communications will
be disabled. Error
responses will be
returned to all communi-
cations requests.
• The exchange of data
with the CPU Unit will
continue.
0211
- Red (lit) F1 Bus Off
detected
A Bus Off condition was
detected.
• The Unit will go offline
and communications will
be disabled. Error
responses will be
returned to all communi-
cations requests.
• The exchange of data
with the CPU Unit will
continue.
0340
Red
(flashing)
OFF H1 CPU Unit
exchange
Unit num-
ber dupli-
cation
The unit number is dupli-
cated on another Unit.
Stops operation. -
Red
(flashing)
OFF H2 CPU Unit
faulty (H2)
- Stops operation. -
Red (lit) OFF H3 DeviceNet
Unit faulty
- Stops operation. -
Red
(flashing)
OFF H4 Node
address
setting
error
The node address set on
the rotary switches is out-
of-range (64 or higher.)
Stops operation. -
Red
(flashing)
OFF H5 Communi-
cations
speed set-
ting error
The communications
speed is set incorrectly.
Stops operation. -
Red
(flashing)
OFF H6 CPU Unit
faulty (H6)
- • Records the error in the
error log. (The time infor-
mation is set to all
zeroes.)
• Stops operation.
000F
Red
(flashing)
OFF H7 I/O table
not regis-
tered
The CPU Unit's I/O table is
not registered.
• Records the error in the
error log.
• Stops operation.
0006
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