420
4184
H
Ethernet I/F
Error
• Communication processing buffer has run out
of space due to consecutive reception of
request messages using the MC protocol.
• Communication processing buffer has run out
of space because received data read is not
performed or cannot keep up with the volume.
• Communication processing is disabled due to
insufficient space in the communication
processing buffer.
• For MC protocol, send a request after receiving
a response to the previous request.
• For socket communication, enable received data
read.
• For socket communication, decrease the
number of data sent from the target device.
QnU
*2
LCPU
*2
4185
H
Ethernet I/F
Error
• Connection to the target device is
disconnected before sending a response using
the MC protocol.
• Connection to the target device is
disconnected during communication.
• For MC protocol, keep the connection until a
response is sent.
• Keep the connection until a sequence of
communication is completed.
• Other error such as 4184
H
may be the cause. If
any other error has occurred, take corrective
action of that error.
QnU
*2
LCPU
*2
4186
H
Ethernet I/F
Error
System error (The argument data in OS is
abnormal.)
• 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.
QnU
*2
LCPU
*2
4187
H
Ethernet I/F
Error
System error (The wait processing in OS is
abnormal.)
• 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.
QnU
*2
LCPU
*2
4188
H
Ethernet I/F
Error
System error (The data length in OS is
abnormal.)
• 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.
QnU
*2
LCPU
*2
4189
H
Ethernet I/F
Error
System error (The protocol information in OS is
abnormal.)
• 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.
QnU
*2
LCPU
*2
418A
H
Ethernet I/F
Error
System error (The address data of
communicating module in OS is abnormal.)
• 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.
QnU
*2
LCPU
*2
Error code
(Hexadecimal)
Error item Error details Corrective action
Corresponding
CPU
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