MITSUBISHI ELECTRIC QJ71C24N - Manual (Page 273)

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MELSEC-Q
10 TROUBLESHOOTING
Protocol
Error code
(Hexa-
decimal)
Error Error Contents
Signal
name
Corrective action
MC
Non
Proce-
dure
Bidire-
ctional
7FC9
H
to
7FCF H
System error • The OS of the Q series C24 detected some error.  ( 1)
7FE6 H
• Remote passwords do not match. 
• Check the remote password and
communicate again.
7FE7 H
•
The remote password is not registered.
•
The remote password processing command was
received on the interface side where the modem
function is not used.
•
The GX Developer connection is selected in the
communication protocol setting on the
corresponding CH.
CHn
ERR.
• A remote password processing
command is not necessary
when a remote password is not
registered.
•
Perform a remote password
unlock processing through GX
Developer. Alternatively, change
the communication protocol
setting of the corresponding CH
to the MC protocol.
7FE8 H
Processing
disabled
• The number of remote password disagreements
exceeded the value designated at the address
200D
H
.
CHn
ERR.
•
Clear the storage area of the
cumulative number of abnormal
completions of unlock processing
(address: 22FC
H ) to 0.
7FEF H Switch setting error
•
There is an error in the switch setting by the GX
Developer
CHn
ERR.
• Write CPU to the parameter and
reboot after correcting the
setting value for the switch.
7FF0 H
Dedicated
instructions
simultaneous
execution error
•
Executed dedicated instructions simultaneously.

•
Do not use dedicated
instructions simultaneously.
7FF1 H Control data error
• Setting value is incorrect.
• Setting value is out of range.

• Correct the setting value in the
control data.
7FF2
H
Communication
protocol setting
error
• Instruction cannot be executed with the current
communication protocol.

• Correct the setting value of the
communication protocol.
7FF3
H
to
7FF4 H
System error • The OS of the Q series C24 detected some error. — ( 1)
7FF5 H
Processing
canceled due to
mode
switching/transmiss
ion sequence
initialization
• The processing was canceled due to mode
switching or receive data clear executed during the
processing.

•
Do not execute mode
switching/receive data clear
during any processing.
7FF7
H
Simultaneous
access error
• Multiple external devices accessed a remote station
on the same network at the same time.

• Multiple external devices must
not access a remote station on
the same network at the same
time.
7FF8 H
7FFF H
System error • The OS of the Q series C24 detected some error. — ( 1)
B000 H
to
BFFF H
 •
Errors detected by the CC-Link module —
• Take corrective action by
referring to the CC-Link
Master/Local Module User's
Manual.
C000 H
to
CFFF H
 • Errors detected by the Ethernet module —
•
Take corrective action by
referring to the Ethernet
Interface Module User's Manual.
F000
H
to
FFFF H

• Errors detected by the MELSECNET/H,
MELSECNET/10 network system

•
Take corrective action by referring
to MELSECNET/H,
MELSECNET/10 network system
reference manual.