Error Code Tables - Mitsubishi QJ71C24/-R2 User Manual

10 TROUBLESHOOTING

10.2 Error Code Tables

10.2.1 Error code table
Error code
Error
(Hexa-
decimal)
3E8
H
to —
3FFF
H
4000
H
to —
4FFF
H
7101
H
System error
7102
H
7103 PLC access error
H
7104
H
to System error
7116
H
7140 Request data error
H
7141 System error
H
7142 Device name error
H
7143 Device No. error
H
Monitor data write
7144
H
error
Monitor PLC No.
7145
H
error
Monitor CPU model
7146
H
name error
Written number of
7147 monitoring points
H
overrun error
10 - 15
The following shows the error codes, error contents, and corrective action for errors
that are generated during communication between the Q series C24 and an external
device.
The signal name in the following table indicates the CH
communication error status that is stored into buffer memory address 201
an error occurs.
The CH side LED on status and communication error status can be confirmed by GX
Developer's System monitor or GX Configurator-SC. (Refer to Section 10.1.1.)
For errors without a corresponding signal name entered to errors generated with the
MC protocol communication, "NAK" comes on.
The following shows the error codes, error contents, and corrective action for errors
generated during communication using MC protocol (excluding A compatible 1C
frame), non procedure protocol, and bidirectional protocol.
(" " in the table is the error code when the target CPU is not a Q/QnACPU.)
Error Contents
(Error detected by the CPU)
(Error detected by the CPU)
The OS of the Q series C24 detected some error.
Cannot communicate with the Q series C24 CPU.
The OS of the Q series C24 detected some error.
Number of request points exceeds the range for the
command.
A word device was designated in a bit units
command.
The last device No. exceeds the range.
Given device last No. > Designated head device
No. + Designated number of points
The OS of the Q series C24 detected some error.
A device that cannot be designated by the given
command was designated.
The head device No. is out of range.
Monitoring was requested before the device to be
monitored was written.
The written PLC No. and PLC No. in the monitor
request are different.
The written CPU model name and the CPU monitor
name in the monitor request are different.
The written number of monitoring points exceeds
the designated range.
side LED on status or
Signal
Corrective action
name
See Troubleshooting of the
QCPU (Q mode) maintenance
—
and inspection user's manual
and take corrective action.
See Appendix of the QCPU (Q
mode) maintenance and
— inspection user's manual
(details) and take corrective
action.
— ( 1)
Make the watchdog timer (timer
1) time longer.
C/N Check if the CPU can
communicate in communication
protocol No. "F".
— ( 1)
Check and correct the external
PRO device transmit message and
restart data communications.
— ( 1)
Check and correct the external
PRO device transmit message and
restart data communications.
Check and correct the external
PRO device transmit message and
restart data communications.
Write the device to be monitored
PRO
before issuing a monitor request.
C/N Rewrite the monitor data.
C/N Rewrite the monitor data.
Check and correct the external
PRO device transmit message and
restart data communications.
MELSEC-Q
/202 when
H H
Protocol
Non
Bidire-
MC Proce-
ctional
dure
10 - 15