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11
TROUBLESHOOTING
Error
Error Name
Code
Number of TCP
731A
connections setting
H
error
Timer setting
731B
magnitude
H
relationship error
Port No. setting
error for automatic
7320
H
communication
function
Target slave port
No. setting error for
7321
automatic
H
communication
function
System area
7324
H
setting error
CPU response
7327
monitoring timer
H
setting error
Basic parameter
732A
H
setting failure
Port No. setting
732E
error for dedicated
H
instruction
Dedicated
732F
instruction
H
interruption
7330
Device code error
H
11 - 25
Description
The number of TCP
connections for GX
Developer connection or the
total number of TCP
connections set in the
preferred node specification
in the basic parameter is
greater than 64.
The magnitude relationships
between various monitoring
timer values and CPU
response monitoring timer
value set in the basic
parameters (Refer to Section
7.2.2 (1)) are incorrect.
The setting of the port No. for
automatic communication
function in the basic
parameter is incorrect.
The setting of the target slave
port No. for automatic
communication function in the
basic parameter is incorrect.
Erroneous data have been
written to the system area
(0031
to 00F1
) of the buffer
H
H
memory.
The setting of the CPU
response monitoring timer in
the basic parameter is
incorrect.
Failed in basic parameter
setting because the GX
Configurator-MB parameters
were being set at power-on.
The setting of the port No. for
dedicated instruction in the
basic parameter is incorrect.
The dedicated instruction
being executed was
interrupted by the basic
parameter setting.
The device code value
specified in MODBUS device
assignment parameter is
incorrect.
Lit LED
Corrective Action
Review the setting of the
number of TCP connections for
COM.ERR.
GX Developer connection and
preferred node specification.
Review the settings of various
monitoring timer values and
COM.ERR.
CPU response monitoring timer
value.
Review the setting of the port
COM.ERR.
No. for automatic
communication function.
Review the setting of the target
COM.ERR.
slave port No. for automatic
communication function.
Do not write data to the system
COM.ERR.
area (0031
to 00F1
H
buffer memory.
Review the setting of the CPU
COM.ERR.
response monitoring timer.
When using GX Configurator-
MB, switch the power on and
then turn on Basic parameter
COM.ERR.
setting request (Y1) after Basic
parameter setting existence (X3)
has turned on.
Review the setting of the port
COM.ERR.
No. for dedicated instruction.
Perform the basic parameter
setting after completion of the
COM.ERR.
dedicated instruction.
Review the setting of the device
COM.ERR.
code.
MELSEC-Q
Occurrence
1)
2)
3)
) of the
H
(Continued on next page)
11 - 25
4)
5)
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