Mitsubishi QJ71MT91 User Manual

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MELSEC-Q
11 TROUBLESHOOTING
Occurrence Error
Code
Error Name Description Lit LED Corrective Action
1) 2) 3) 4) 5)
73CCH
In the offline mode,
MODBUS
R
device
assignment parameter setting
request (Y8) was turned on.
COM.ERR.
Do not turn on MODBUS
R
device assignment parameter
setting request (Y8) in the offline
mode.
73CDH
Offline mode
error
In the offline mode, PING test
execution request (Y1C) was
turned on.
COM.ERR.
Do not turn on PING test
execution request (Y1C) in the
offline mode.
73D0H
As the TCP connection was
cut off from the target device,
the slave function of the
QJ71MT91 could not send a
response message.
COM.ERR.
• Check whether the operation
status of the target device is
normal or not.
• Check the line status for an
error.
73D1H
Response
message
transmission
failure
As the TCP connection was
cut off from the target device,
the response message could
not be returned via GX
Developer connection.
COM.ERR.
• Check whether the operation
status of the target device is
normal or not.
• Check the line status for an
error.
73D2H
Preferred
connection
count over
error
TCP connections exceeding
the number preset in the
preferred node specification
was attempted to be
established.
COM.ERR.
• Increase the maximum number
of TCP connections with the
target node in the preferred
node specification.
• Decrease the number of
connections simultaneously
used with the target node.
73D3H
Response
message
transmission
failure
As the TCP connection was
cut off from the target device,
the response message via GX
Developer connection could
not be returned.
COM.ERR.
• Check whether the operation
status of the target device is
normal or not.
• Check the line status for an
error.
The send/receive processing
was forcibly interrupted by the
basic parameter setting
processing.
COM.ERR.
Perform the basic parameter
setting processing after the
send/receive processing is over.
73D4H
An error occurred in the TCP
connection and the
send/receive processing was
forcibly interrupted.
COM.ERR.
• Retry after a little while.
• Check whether the operation
status of the target device is
normal or not.
• Check the line status for an
error.
73D5H
Send/receive
processing
interruption
As the TCP connection was
being closed, the send/receive
processing was interrupted.
COM.ERR.
• If this occurs at execution of the
dedicated instruction, set “TCP
connection is not closed after
instruction completion” in the
close option of the execution
type.
• If the number of connections
used exceeds the maximum
(64), bring it within the range.
• Check whether the operation
status of the target device is
normal or not.
• Check the line status for an
error.
• Retry after a little while.
(Continued on next page)

Mitsubishi QJ71MT91 Specifications

General

Brand	Mitsubishi
Model	QJ71MT91
Category	Controller
Language	English