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12.3 Error Code List
12.3.11 Error codes returned to request source during communication with CPU module
12
TROUBLESHOOTING
Table12.12 Error code
Error code
(Hexadecimal)
Error item Error details Corrective action
4A00
H
Link-related
error
• Access to the specified station cannot be
made since the routing parameters are not
set to the start source CPU module and/or
relay CPU module.
• For routing via a multiple CPU system, the
control CPU of the network module for data
routing has not started.
• When System A/System B is not yet
identified in a redundant system
configuration, communication was made
with the other station via the network
module.
• Set to the related stations the routing parameters for
access to the specified station.
• Retry after a while, or start communication after
confirming that the system for data routing has started.
• In a redundant system configuration, connect the
tracking cable, start System A/System B normally, and
then restart communication.
4A01
H
The network of the No. set to the routing
parameters does not exist.
Check and correct the routing parameters set to the
related stations.
4A02
H
Access to the specified station cannot be
made.
• Check the network module/link module for an error or
offline status.
• Check to see if the network number/PC number setting
has no mistake.
4A03
H
A request for network test was issued. Check the request data of the MC protocol, etc.
4B00
H
Target-related
error
An error occurred in the access destination or
relay station, or the specified transfer setup
(request destination module I/O number) is
illegal.
• Take corrective action after checking the error that
occurred at the specified access destination or the
relay station to the accessed station.
• Check the transfer setup (request destination module
I/O number or programmable controller number) in the
request data of the MC protocol, etc.
4B01
H
The target is not the No. 1 CPU of the multiple
CPU system.
Execute the request for the No. 1 CPU of the multiple
CPU system.
4B02
H
The request is not addressed to the CPU
module.
Perform operation for the module that can execute the
specified function.
4B03
H
• The specified route is not supported by the
specified CPU module version.
• The communication target CsPU is not
mounted.
Check whether the specified route is supported or not.
4B04
H
The specified transfer setup (request
destination module I/O number) is not
supported.
In the target setup, an illegal value is set as the head I/O
number of the target module.
4C00
H
Multiple CPU-
related error
The specified device is unavailable for the
motion CPU or outside the device range.
Check the request data contents.
4C08
H
There are a total of 33 or more DDWR and
DDRD requests.
Execute again after reducing the number of DDWR and
DDRD requests to be executed simultaneously.
4C09
H
The specification of the requested CPU
module No. is illegal.
Check the request data contents.
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