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11
TROUBLESHOOTING
11.3.3 Error code list
Error
Error Name
Code
3E8
H
Error code issued by programmable controller
to
CPU.
4FFF
H
7301
Switch 1 error
H
7302
Switch 2 error
H
Switch 3, 4
7303
H
error
7305
Switch 5 error
H
ROM check
7306
H
error
RAM check
7307
H
error
Parameter
730A
starting
H
method error
11 - 23
When an error occurs in any processing of the QJ71MT91, the error code is stored into
its buffer memory.
This section explains the error details and corrective actions to be taken at error
occurrence.
The "Occurrence" field of the following error code table indicates that each of the errors
may occur when:
1) The programmable controller is powered ON or the basic parameters are set
2) Master function is on
3) Slave function is on
4) GX Developer connection function is on or
5) During PING test or unit test.
Description
The setting of the intelligent
function module switch 1
(operation mode setting) is
incorrect.
The setting of the intelligent
function module switch 2
(communication condition
setting) is incorrect.
The setting of the intelligent
function module switch 3, 4
(IP address setting) is
incorrect.
The setting of the intelligent
function module switch 5
(redundant settings) is
incorrect.
An error was detected by the
ROM check made at power-
on.
An error was detected by the
RAM check made at power-
on.
Parameter setting using GX
Configurator-MB was made
to the programmable
controller CPU while b0, b1
of the intelligent function
module switch 2
(communication condition
setting) was preset to "Start
with the default parameters".
Lit LED
Corrective Action
Refer to the QCPU User's
Manual (Hardware Design,
Maintenance and Inspection).
Review the setting of the
ERR.
intelligent function module
switch 1.
Review the setting of the
ERR.
intelligent function module
switch 2.
Review the setting of the
ERR.
intelligent function module
switch 3, 4.
• Review the setting of the
intelligent function module
switch 5.
ERR.
• When the redundant settings
are not to be used, delete the
setting of the intelligent
function module switch 5.
It is a QJ71MT91 hardware
fault.
ERR.
Please consult your local
Mitsubishi representative.
It is a QJ71MT91,
programmable controller CPU
ERR.
or base unit failure.
Please consult your local
Mitsubishi representative.
• When using the default
parameter setting, delete the
QJ71MT91 parameters set to
the programmable controller
CPU.
COM.ERR.
• When starting the QJ71MT91
with user setting parameters
set from GX Configurator-MB
or sequence program, turn
ON b0, b1 of the intelligent
function module switch 2.
MELSEC-Q
Occurrence
1)
2)
3)
4)
5)
(Continued on next page)
11 - 23
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