Table of Contents
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11
TROUBLESHOOTING
Error
Error Name
Code
Buffer memory
7346
address range
H
error
IP address setting
7347
H
error
MODBUS device
7348
number setting
H
range error
MODBUS device
7349
points setting
H
error
Module ID setting
734A
H
error
Execution type
734B
H
setting error
734C
H
Response
monitoring timer
setting error
734D
H
Write data
734E
storage size
H
setting error
11 - 27
Description
The setting range of the
buffer memory in the
automatic communication
parameter is outside the
range of the automatic
communication function
buffer input/output area.
The setting of the target IP
address set in the automatic
communication parameter or
dedicated instruction's
control data is incorrect.
The MODBUS device range
of the read/write target set in
the automatic
communication parameter or
dedicated instruction's
control data is greater than
the maximum value (65536).
The MODBUS device range
of the read/write target set in
the automatic
communication parameter or
dedicated instruction's
control data is outside the
setting range.
The setting of the module ID
set in the automatic
communication parameter or
dedicated instruction's
control data is incorrect.
The setting of the execution
type set in the dedicated
instruction's control data is
incorrect.
The setting of the response
monitoring timer in the
dedicated instruction's
control data is outside the
setting range.
The setting of the response
monitoring timer in the
dedicated instruction's
control data is less than the
setting of the split reception
monitoring timer value.
The setting of the write data
storage size in the dedicated
instruction's control data is
incorrect.
Lit LED
Corrective Action
Correct the buffer memory
COM.ERR.
setting outside the range.
Review the setting of the IP
COM.ERR.
address.
Review the setting range of
COM.ERR.
the MODBUS device.
Review the setting range of
COM.ERR.
the MODBUS device.
Review the setting of the
COM.ERR.
module ID.
Review the setting of the
COM.ERR.
execution type.
Review the setting of the
response monitoring timer so
COM.ERR.
that it falls within the setting
range.
Make the response monitoring
timer greater than the split
COM.ERR.
reception monitoring timer
value.
Review the setting of the write
COM.ERR.
data storage size.
MELSEC-Q
Occurrence
1)
2)
3)
4)
(Continued on next page)
11 - 27
5)
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