Mitsubishi QJ71MT91 User Manual page 255

11 TROUBLESHOOTING
Error
Error Name
Code
Request
734F message size
H
setting error
Automatic
communication
7351
H
function start
interruption
Basic
7352 parameter not
H
set
Exception
7360 message
H
reception
Byte count
7361
H
error
Reference
7362
H
number error
Protocol ID
7363
H
error
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Description
The request message size
specified in the argument
((S2)+0) of the MBREQ
instruction is incorrect.
The start of the automatic
communication function was
interrupted due to the
processing of the basic
parameter setting.
The automatic communication
function was started or stopped
without the basic parameter
being set.
The automatic communication
function was started when
parameter setting was being
made on GX Configurator-MB
at power-on.
When the automatic
communication function or
dedicated instruction is used,
the target slave device
returned an exception code in
reply to the request message
sent by the QJ71MT91.
In the automatic
communication function or
dedicated instruction, the
number of bytes in the received
response message is less or
more than necessary.
The value of the reference
number in the response
message received by the
dedicated instruction is
incorrect.
In the automatic
communication function or
dedicated instruction, the
protocol ID of the received
response message is other
than "0: MODBUS protocol".
R
Lit LED Corrective Action
Review the setting of the request
COM.ERR.
message size.
After turning ON the Automatic
communication parameter setting
request/Automatic communication
start request (Y4), do not turn ON
COM.ERR.
the Basic parameter setting
request (Y1) until the Automatic
communication operation status
(X6) turns ON.
Start or stop the automatic
communication function with
COM.ERR.
Basic parameter setting existence
(X3) on.
When using GX Configurator-MB,
switch the power on and then turn
on Automatic communication
parameter setting
COM.ERR.
request/Automatic communication
start request (Y4) after Basic
parameter setting existence (X3)
has turned on.
• Refer to the exception code
returned from the target slave
device, and resolve the problem.
COM.ERR.
• Resolve the problem that
occurred in the target slave
device.
COM.ERR.
On the target slave side, check
whether the contents of the
COM.ERR.
returned response message are
correct or not.
COM.ERR.
MELSEC-Q
Occurrence
1) 2) 3) 4)
(Continued on next page)
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5)