Mitsubishi Electric MELSEC iQ-R Series User Manual page 477

Error code Error
(hexadecima
l)
*1
714AH Cannot execute a
command during
RUN
714DH Unusable
command error
714EH Monitor network
No. error
7150H System error
7151H PC No.
designation error
7153H Frame length
error
7155H Monitor
unregistration
error
7156H System error
7160H PLC access error
7161H System error
7164H Request error
7167H Cannot execute a
command during
RUN
7168H Cannot execute a
command during
RUN
Description Signal
name
• A write command was C/N
designated when the
'Online change' is
disabled.
• Parameter or program
was written during RUN.
• An unsupported C/N
command is requested to
the access target CPU
module.
• The registered monitor C/N
network number and the
network number in the
monitor request are
different.
• The operating system of 
C24 detected some error.
• A PC No. other than "FF" C/N
or "0 to 120 (00H to 78H)"
was designated.
• The request exceeded the CHn
limit of processing points ERR.
that are predetermined for
each command and
allowed for one
transmission.
• Monitoring was requested PRO
before the monitor
registration has been
performed.

• The operating system of
C24 detected some error.
• CPU model cannot be C/N
confirmed.

• The operating system of
C24 detected some error.

• The request contents or
the device designation
method is incorrect.
• A write command was C/N
designated when the
Online change is disabled.
• A command that cannot C/N
be executed during RUN
was designated.
Corrective action Protocol
MC
• Change the setting to enable 
the 'Online change' and restart
data communications.
• Stop the CPU module and
restart data communications.

• Check and correct the
transmission message from
the target device and restart
data communications.
• If no error is found in the
command, clear the
programmable controller CPU
information and retry.

• Check and correct the other
station access valid module
No. in the network
parameters, and restart data
communications.
• Perform the monitor
registration again.
Page 490 Corrective actions
for system error

• Check and correct the
transmission message from
the target device and restart
data communications.
• Modify the setting of the 
transmission message from
the target device so that the
request will not exceed the
limit of processing points that
are allowed for one
transmission and
predetermined for each MC
protocol command. Then,
retry data communications.

• Register the device to be
monitored before issuing a
monitor request.
Page 490 Corrective actions
for system error

• If the CPU module has an
error, remove the CPU module
error and restart data
communications.
Page 490 Corrective actions
for system error

• Check and correct the
transmission message/
request from the target device,
and restart data
communications.

• Change the setting to enable
the online change and restart
data communications.
• Stop the CPU module and
restart data communications.
• Stop the CPU module and
restart data communications.
Nonpr Bidire Prede
ocedu ctiona fined
ral l
27 TROUBLESHOOTING
475
27.4 Error Code List
27