3-5
3 Error Tables
NJ-series Troubleshooting Manual (W503)
3-1 Errors by Source
3
3-1-2 Errors in the PLC Function Module
10070000 hex SD Memory
Card Access
Power OFF
Error
The power supply
to the Controller
was interrupted
during access to
the SD Memory
Card.
• The Controller power supply
was turned OFF while the SD
BUSY indicator was lit.
• The power supply to the Con-
troller was interrupted momen-
tarily while the SD BUSY
indicator was lit.
S NJ-series
CPU Unit
Hardware
User’s Manual
(Cat. No.
W500)
10310000 hex
(Ver. 1.02)
Incorrect SD
Memory Card
Removal
SD Memory Card
removal process-
ing failed.
• The SD Memory Card was
removed while the SD PWR
indicator was lit.
S Same as
above.
Errors Related to Unit Configuration
Event code Event name Meaning Assumed cause
Level
Reference
Maj Prt Min Obs Info
04010000 hex I/O Bus
Check Error
An error occurred in
a bus line transmis-
sion between the
CPU Unit and the
Units in the rack
slots. Or, detection
of all Special I/O
Units and CPU Bus
Units was not com-
pleted when the
power supply to the
Controller was
turned ON.
• The I/O Connecting Cable is
disconnected or wires inside it
are broken.
• Conductive material has gotten
inside.
• The connector contact is faulty
due to foreign material in the
connector.
• Noise
• A Unit has failed.
S NJ-series
CPU Unit
Hardware
User’s Manual
(Cat. No.
W500)
24010000 hex Unsupported
Unit Detected
An unsupported
CJ-series Unit or
Power Supply Unit
is mounted.
• An unsupported CJ-series Unit
or Power Supply Unit was
detected.
S Same as
above.
24020000 hex Too Many I/O
Points
The total number of
I/O points in the
connected CJ-
series Units
exceeds the maxi-
mum specified
value of the CPU
Unit.
• The total number of I/O points
in the connected CJ-series
Basic I/O Units exceeds 2,560.
S Same as
above.
24030000 hex End Cover
Missing
The End Cover is
not connected to
right end of the
CPU Rack or an
Expansion Rack.
• The End Cover is not con-
nected to right end of the CPU
Rack or an Expansion Rack.
• The End Cover is not con-
nected properly.
S Same as
above.
24040000 hex Incorrect
Unit/Expan-
sion Rack
Connection
The number of
Units or Expansion
Racks exceeds the
maximum value
specified for the
CPU Unit. Or, an
Interrupt Input Unit
was mounted to a
unsupported slot or
to an Expansion
Rack.
• More than 10 Units are con-
nected to one Rack.
• More than three Expansion
Racks are connected.
• More than two Interrupt Input
Units are mounted.
• An Interrupt Input Unit was
mounted to a unsupported slot
or to an Expansion Rack.
S Same as
above.
Event code Event name Meaning Assumed cause
Level
Reference
Maj Prt Min Obs Info
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