10 - 22 10 - 22
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 โข The OS of the Q series C24 detected some error. ๏ฃง
(
1)
7FE6H โข Remote passwords do not match. ๏ฃง
โข Check the remote password and
communicate again.
7FE7H
โข The remote password is not registered.
โข The remote password processing command was
received on the interface side where the modem
function is not used.
โข The GX Developer connection is selected in the
communication protocol setting on the
corresponding CH.
CHn
ERR.
โข A remote password processing
command is not necessary
when a remote password is not
registered.
โข 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
โข The number of remote password disagreements
exceeded the value designated at the address
200D
H.
CHn
ERR.
โข Clear the storage area of the
cumulative number of abnormal
completions of unlock processing
(address: 22FC
H) to 0.
7FEFH Switch setting error
โข There is an error in the switch setting by the GX
Developer
CHn
ERR.
โข Write CPU to the parameter and
reboot after correcting the
setting value for the switch.
7FF0H
Dedicated
instructions
simultaneous
execution error
โข Executed dedicated instructions simultaneously. ๏ฃง
โข Do not use dedicated
instructions simultaneously.
7FF1H Control data error
โข Setting value is incorrect.
โข Setting value is out of range.
๏ฃง
โข Correct the setting value in the
control data.
7FF2H
Communication
protocol setting
error
โข Instruction cannot be executed with the current
communication protocol.
๏ฃง
โข Correct the setting value of the
communication protocol.
7FF3H
to
7FF4
H
System error โข The OS of the Q series C24 detected some error. โ ( 1)
7FF5
H
Processing
canceled due to
mode
switching/transmiss
ion sequence
initialization
โข The processing was canceled due to mode
switching or receive data clear executed during the
processing.
๏ฃง
โข Do not execute mode
switching/receive data clear
during any processing.
7FF7H
Simultaneous
access error
โข Multiple external devices accessed a remote station
on the same network at the same time.
๏ฃง
โข Multiple external devices must
not access a remote station on
the same network at the same
time.
7FF8H
7FFFH
System error โข The OS of the Q series C24 detected some error. โ ( 1)
B000
H
to
BFFF
H
๏ฃงโข Errors detected by the CC-Link module โ
โข Take corrective action by
referring to the CC-Link
Master/Local Module User's
Manual.
C000
H
to
CFFF
H
๏ฃงโข Errors detected by the Ethernet module โ
โข Take corrective action by
referring to the Ethernet
Interface Module User's Manual.
F000
H
to
FFFF
H
๏ฃง
โข Errors detected by the MELSECNET/H,
MELSECNET/10 network system
๏ฃง
โข Take corrective action by referring
to MELSECNET/H,
MELSECNET/10 network system
reference manual.