Mitsubishi Melsec-Q Series User Manual page 451

Error code
Error item
(Hexadecimal)
419E
H
Ethernet
419F
H
I/F
Error
41A0
H
41A1
H
41A2
H
41A3
H
41A4
H
41A5
Ethernet
H
I/F
socket com-
muinication
41A6
error
H
41A8
H
41AB
H
Table12.2 Error code
Error details
Connection to the module was unsuccessful or
interrupped.
System error (The I/O control processing is
abnormal.)
Data cannot be sent since the target device has
no free space in receive area (TCP window size
is zero).
The port number setting for the Built-in Ethernet
port QCPU is invalid.
The port number setting for the target device is
invalid.
• For TCP/IP, the same Host station port No.
is specified as MC protocol.
• For TCP/IP, a connection with the same host
station No. and the same destination port
No. are already specified to one communi-
cation target.
• For UDP/IP, the same Host station port No.
is specified as MC protocol.
• For UDP/IP, the specified host station No. is
duplicated.
The IP address setting of the target device for
OPEN processing is invalid.
Connection was not established in OPEN pro-
cessing for TCP connection.
Data length is out of permissible range.
Failed to send data due to resend timeout in TCP.
CHAPTER12 TROUBLESHOOTING
Corrective action
• Check the receiving module operation.
• Check the status of the lines such as a cable, a hub
and a route to receiving modules
• Retry to connect a little while later, if the error occured
in communication.
• Check whether the power module and programmable
controller CPU are attached properly.
• Check whether the system use environment is within
the range of the programmable controller CPU
genaral specifications.
• Check whether the power capacity is sufficient.
• Reset the CPU module.
If the error is shown once again, the CPU module
hardware is abnormal. Please contact with system
• Retry after a while
• Check the behavior of the target device.
• Check whether the target device is processing data
receiving.
• Check whether the QnUDE(H)CPU is sending any
unnecessary data.
Correct the port number.
• Specify a port number that is not duplicated with that of
MC protocol
• Review port numbers of the Built-in Ethernet port
QCPU and correct if duplicated.
• Specify a port number that is not duplicated with that of
MC protocol
• Review port numbers of the Built-in Ethernet port
QCPU and target device and correct if duplicated.
Correct the IP address. Specify A, B, or C for the class.
• Check the bihavior of the target device.
• Check OPEN processing of the target device.
• Correct the port No. of the Built-in Ethernet port QCPU
and the IP address, port No., and open processing
method of the target device.
• Check whether the cables are securely connected.
• Correct the data length.
• If the data is longer than the range, split the data and
send them.
• Review the IP address and Ethernet address of the tar-
get device.
• Check whether the target device has the ARP function.
If not, communicate with the one that has the ARP
function.
• Check the bihavior of the target device.
• The line may be congested with packets. Resend data
after a while.
• Check whether the cables are securely connected.
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