Mitsubishi MELSEC LJ71C24, User Manual

Page: 298 / 428

15 - 29 15 - 29
15 TROUBLESHOOTING
Protocol
Error code
(Hexa-
decimal)
Error
Description
Signal
name
Corrective action
MC
Non-
proce-
dural
Bi-
direc-
tional
Pre-
defined
7F91
H
to
7F96
H
7F98
H
to
7F9A
H
7F9D
H
7F9E
H
7FA0
H
to
7FA3
H
7FA8
H
7FAA
H
to
7FAD
H
7FAF
H
to
7FB2
H
7FB5
H
7FB6
H
7FB8
H
to
7FBC
H
7FC0
H
to
7FC4
H
7FC7
H
System error
•
The OS of the C24 detected some
error.
⎯
( 1)
7FC8
H
Protocol setting data
error
•
The predefined protocol setting written
to the C24 is in any of the following
states.
1) The predefined protocol has an error.
2) Unsupported function is included in
the setting.
3) Set data is corrupted.
CHn
ERR.
•
Check the predefined protocol in
Protocol setting data error information
(buffer memory: 4086
H
to 4089
H
),
correct and write it again to the C24,
and execute the CPRTCL instruction.
•
Check the version of the C24, and use
the predefined protocol function within
the range of supported functions.
•
If this error persists even after rewriting,
replace the module.
7FC9
H
to
7FCF
H
System error
•
The OS of the C24 detected some
error.
⎯
( 1)
7FD0
H
to
7FE5
H
Refer to the error code list for use of the modem function, and take corrective action. (Refer to Section 15.2.4.)
7FE6
H
Remote password
error
•
Remote passwords do not match.
⎯
•
Check the remote password and
communicate again.
7FE7
H
Remote password
error
•
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 MELSOFT 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.
•
Unlock the remote password by
MELSOFT. Alternatively, change the
Communication protocol setting of the
corresponding channel to MC protocol.
7FE8
H
Remote password
error
•
The number of remote password
mismatch exceeded the value
designated at the address 200D
H
.
CHn
ERR.
•
Clear the storage area of the
accumulated count of unlock process
abnormal completion processing
(address: 22FC
H
) to 0.
7FE9
H
Refer to the error code list for use of the modem function, and take corrective action. (Refer to Section 15.2.4.)
7FEF
H
Switch setting error
•
There is an error in the switch setting by
MELSOFT.
CHn
ERR.
•
After correcting the switch setting, write
parameters to the CPU module and
reboot it.