Mitsubishi Electric MELSEC iQ-RJ71C24-R4 - Page 490

488
27 TROUBLESHOOTING
27.4 Error Code List
7FE7H 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 for the
corresponding channel.
 • 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 for the
corresponding channel to MC
protocol.

7FE8H Remote password
error
• The number of remote
password mismatch
exceeded the designated
value of the address
200DH.
CHn
ERR.
• Clear the 'accumulated count
of unlock process abnormal
completion' (Un\G8956) to '0'.

7FE9H Modem function
error
• The number of callback
denial exceeded the
designated value of
address 2002H.
CHn
ERR.
• Clear the callback denial
accumulated count (address:
22F1H) to '0'.

7FECH Module extended
parameters do
not exist.
Reading data has failed
since module extended
parameters do not exist.
 • Write module extended
parameters to C24 or CPU
module.
7FEDH Simultaneous
execution error
• More than one target
device accessed to the
parameter file at the same
time.
CHn
ERR.
• Do not access to the
parameter file from more than
one target device
simultaneously.
7FEFH Parameter setting
error
• The parameter settings
with MELSOFT are
incorrect.
CHn
ERR.
• Correct the parameter
settings, write it to the CPU
module, and restart it.

7FF0H Dedicated
instructions
simultaneous
execution error
• Dedicated instructions
were executed
simultaneously.
 • Do not execute the dedicated
instructions simultaneously.

7FF1H Control data error • Setting value is incorrect.
• Setting value is out of the
range.
 • Correct the setting value in the
control data.

7FF2H Communication
protocol setting
error
• The instruction cannot be
executed with the current
communication protocol.
 • Correct the setting value of
the communication protocol.


7FF3H to
7FF4H
System error • The operating system of
C24 detected some error.
Page 490 Corrective actions
for system error
7FF5H Transmission
cancel at mode
switching/
transmission
sequence
initialization
■The processing in
operation was cancelled due
to performance of the
following functions:
• Mode switching,
transmission sequence
initialization, receive data
clear (by buffer memory),
user frame use enable/
disable designation, UINI
instruction, programmable
controller CPU
information clear
 • Do not execute these
functions during various
processes in progress.

7FF7H Simultaneous
access error
• Multiple target devices
accessed to a station on
the same network at the
same time.
 • Do not access to a station on
the same network from
multiple target device at the
same time.

7FFBH Channel error • Incorrect channel was
designated with a
dedicated instruction.
 • Review the channel for a
dedicated instruction.

Error code
(hexadecima
l)
Error Description Signal
name
Corrective action Protocol
MC Nonpr
ocedu
ral
Bidire
ctiona
l
Prede
fined