Mitsubishi Electric MELSEC iQ-R02CPU - Page 325

3 TROUBLESHOOTING
3.5 List of Error Codes
323
3
C622H An error has occurred during file transfer to the FTP
server.
• Delete unnecessary files on the FTP server to increase
free space.
• Check connection with the FTP server.
• The specified file may be used in the other process.
Wait for a while and perform the operation again.
• The Ethernet line may be congested. Wait for a while
and perform the operation again.

C623H A response could not be received from the FTP server. • Check that the FTP server name is registered in the
DNS.
• Change the FTP server name to the IP address, and
check the operation.
• Check that the data communications with the FTP
server is possible by using the Ping command.

C700H The module processing was completed with an error. • Execute the communication status test, and if the test
was completed with an error, take the corrective action.
• Execute the module communication test, and check
that there is no failure in the module.

C701H The IP address (network number) setting is incorrect in
communications using the IP packet transfer function.
Check the IP address (network number). 
C702H The IP address (station number) setting is incorrect in
communications using the IP packet transfer function.
Check the IP addresses (station number). 
C703H The destination IP address (upper level) setting is
incorrect in communications using the IP packet transfer
function.
Check the destination IP address. 
C704H The destination IP address (lower level) setting is
incorrect in communications using the IP packet transfer
function.
Check the destination IP address. 
C705H
to
C707H
The module processing was completed with an error. • Execute the communication status test, and if the test
was completed with an error, take the corrective action.
• Execute the module communication test, and check
that there is no failure in the module.

C708H When communicating with the IP packet transfer
function, "IP Packet Transfer Function" is set as "Not
Use" in "IP Packet Transfer Setting" under "Application
Settings" of the Ethernet-equipped module connected
with the Ethernet devices.
When communicating with the IP packet transfer
function, set "IP Packet Transfer Function" as "Not Use"
in "IP Packet Transfer Setting" under "Application
Settings".

C709H A communication error has occurred with MELSOFT
direct connection.
• Do no execute the specification of the direct
connection when direct connection is not used.
• Do not power off the system or reset the CPU module,
or remove the cable during the communications when
direct connection is used.

C810H Remote password authentication has failed when
required.
Set a correct password and perform password
authentication again.

C811H Remote password authentication has failed when
required.
Set a correct password and perform password
authentication again one minute later.

C812H Remote password authentication has failed when
required.
Set a correct password and perform password
authentication again 5 minutes later.

C813H Remote password authentication has failed when
required.
Set a correct password and perform password
authentication again 15 minutes later.

C814H Remote password authentication has failed when
required.
Set a correct password and perform password
authentication again 60 minutes later.

C815H Remote password authentication has failed when
required.
Set a correct password and perform password
authentication again 60 minutes later.

C816H The security function was activated and remote
password authentication cannot be performed.
Set a correct password and perform password
authentication again after a certain period of time.

C840H Number of transient request exceeded the upper limit of
simultaneously processable requests.
• Pause the transient transmission temporarily, and retry
the operation.
• Lower the transient transmission usage frequency, and
then perform again.

Error
code
Error details and causes Action Detailed information