3 TROUBLESHOOTING
3.5 List of Error Codes
321
3
C403H Multiple dedicated instructions was executed
simultaneously.
• Do not execute the dedicated instructions which do not
support simultaneous execution.
• Correct the specified connection number and execute
the dedicated instruction again.
C404H The protocol being executed by the ECPRTCL instruction
was canceled.
Check the canceled protocol in the control data of the
ECPRTCL instruction (execution count result) and
eliminate the cause of the cancellation.
C405H The protocol number specified by the ECPRTCL
instruction is incorrect.
Correct the specified protocol number.
C406H The continuous protocol execution count of the
ECPRTCL instruction is incorrect.
Correct the continuous protocol execution count.
C407H The connection number specified by the ECPRTCL
instruction is incorrect.
• Correct the specified connection number and execute
the protocol again.
• Correct the specified connection number in "External
Device Configuration" under "Basic Settings" of the
Ethernet-equipped module and execute the protocol
again.
C408H An error has occurred when the send processing of the
predefined protocol using the ECPRTCL instruction was
performed.
• Check the operation of the external device or switching
hub.
• Since there may be congestion of packets on the line,
send data after a certain period of time.
• Check if the connection cable is disconnected.
• Check that there is no connection failure with the
switching hub.
• 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.
C410H Receive waiting time of the ECPRTCL instruction timed
out.
• Check if the cable is disconnected.
• Correct the specified connection number in "External
Device Configuration" under "Basic Settings" of the
Ethernet-equipped module and execute the protocol
again.
• Check that there is no error in the external device.
• Check that the sending from the external device is not
interrupted.
• Check that there is no data lost due to a receive error.
• Check that there is no error in the data (packet) sent by
the external device.
C412H The data which cannot be converted from ASCII to binary
code was received.
• Check that there is no data lost due to a receive error.
• Check that there is no error in the data (packet) sent by
the external device.
C413H The number of digits of the received data using the
predefined protocol is not sufficient.
• Check that there is no data lost due to a receive error.
• Check that there is no error in the data (packet) sent by
the external device.
C414H The number of digits of the received data using the
predefined protocol is incorrect.
• Check that there is no data lost due to a receive error.
• Check that there is no error in the data (packet) sent by
the external device.
C417H The data length or data quantity of the received data
using the predefined protocol is out of range.
• Check the maximum allowable data length and specify
the maximum length or less in the data length storage
area.
• Check the maximum allowable data quantity, and
specify the maximum quantity or less in the data
quantity storage area.
C420H Protocol setting data write has failed. • Write the data again.
• If the error occurs again even after taking the above,
the possible cause is a hardware failure of the
specified module. Please consult your local Mitsubishi
representative.
C421H Writing was requested to the module whose flash ROM
write count had exceeded the limit.
Replace the module because the number of writes
exceeded the limit.
C430H Protocol setting data was written during the ECPRTCL
instruction execution.
Do not write the protocol setting data during the
ECPRTCL instruction execution.
Error
code
Error details and causes Action Detailed information
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