Mitsubishi Electric Q26UD(E)HCPU User Manual page 421

Error code
Error item
(Hexadecimal)
Ethernet I/F
4174
H
Error
Ethernet I/F
4176
H
Error
Ethernet I/F
4178
H
Error
Ethernet I/F
4180
H
Error
Ethernet I/F
4181
H
Error
Ethernet I/F
4182
H
Error
Ethernet I/F
4183
H
Error
Error details
Requested for a wrong module to unlock remote
password.
Communication error occurred in direct
connection.
• File operation is disabled because the File
Transfer Protocol (FTP) function is in
operation.
• Online operation requiring a file access is
performed with a programming tool while the
File Transfer Protocol (FTP) function is in
operation.
System error. (The setting data in OS is
abnormal.)
Transmission to the receiving modules is
unsuccessful.
Communication with receiving modules caused a
time-out error.
Communication with receiving modules was
interrupted.
Corrective action
• Stop transmitting from several modules
simultaneously when setting a remote password
and using User Datagram Protocol (UDP) in
MELSOFT connection.
• The MELSOFT connection can be used with
Transmission Control protocol (TCP) when
setting a remote password.
• Do not specify the direct connection when using
other connection setting.
• Do not turn off the CPU power during
communication, reset the power, and plug out
the cable in direct connection.
Retry after the operation for FTP function is
completed.
• Check that the power supply module and the
CPU module are mounted/connected properly.
• Check that the system is operating within the
general specifications of the CPU module.
• Check whether the power capacity is sufficient.
• Reset the CPU module.
• Execute again. If the same error code is
displayed, the cause is a hardware failure of the
CPU module. Please consult your local
Mitsubishi representative.
• Check the external device operation.
• Check the status of devices (such as cables,
hubs, and routers) on the line to the external
devices.
• Some line packets may be engaged. Retry to
communicate a little while later.
• The receiving module may have no free space in
receive area (TCP window size is small). Check
whether the receiving module processes receive
data, or whether the CPU module does not send
unnecessary data.
• Check whether the settings of the subnet mask
pattern and the default router IP address of the
CPU module and the receiving modules are
correct, or whether the class of the IP address is
correct.
• Check whether the IP address specified as
target is correct.
• Check the external device operation.
• Check the status of devices (such as cables,
hubs, and routers) on the line to the external
devices.
• Some line packets may be engaged. Retry to
communicate a little while later.
• Check whether the target device supports the
function executed.
• Check the external device operation.
• Check the status of devices (such as cables,
hubs, and routers) on the line to the external
devices.
• This error may occur when Forced connection
invalidation is executed to the connection under
communication. In this case, clear the error
because the error is not problematic.
APPENDICES
Corresponding
CPU
A
QCPU
LCPU
QCPU
LCPU
QCPU
LCPU
*2
QnU
*2
LCPU
*2
QnU
*2
LCPU
*2
QnU
*2
LCPU
*2
QnU
*2
LCPU
419