4 TROUBLESHOOTING
4.5 List of Error Codes
267
4
D24EH The target station setting in the dedicated instruction is
incorrect.
• The value set for the control block of the dedicated
instruction is out of range. Execute again after
correcting the value.
• If the error occurs again even after taking the above,
please consult your local Mitsubishi representative.
D24FH The dedicated instruction was executed when the
station number of the own station has not been set yet.
• Specify the station number using the UINI
instruction, and execute the instruction again.
• If the error occurs again even after taking the above,
please consult your local Mitsubishi representative.
D251H When the dedicated instruction was executed, arrival
check error has occurred.
• Execute again after increasing the number of
resends at the request source.
• When the own station, target station, or relay station
detected an error, identify the cause of the error and
take action.
• Lower the transient transmission usage frequency,
and then perform again.
• When "Communication Mode" in "Application
Settings" of the master station (submaster station) is
set to "High-Speed", change it to "Normal" and retry
the operation.
• Check if the switching hub and the cables at the
request source are connected properly.
D252H Transmission completion wait timeout has occurred
when the dedicated instruction was executed.
• Check the network status using the CC-Link IE Field
Network diagnostics of the engineering tool, and
take action.
• Execute again after increasing the number of
resends at the request source.
• Lower the transient transmission usage frequency,
and then perform again.
• When "Communication Mode" in "Application
Settings" of the master station (submaster station) is
set to "High-Speed", change it to "Normal" and retry
the operation.
• If the error occurs again even after taking the above,
please consult your local Mitsubishi representative.
D253H A response timeout has occurred when the dedicated
instruction was executed.
• Check the network status using the CC-Link IE Field
Network diagnostics of the engineering tool, and
take action.
• Execute again after increasing the number of
resends at the request source.
• Lower the transient transmission usage frequency,
and then perform again.
• When "Dynamic Routing" in "Application Settings" is
set to "Enable", check the 'Communication path
determination status' (Un\G24480 to Un\G24495)
and check if communication to the target network
number is possible.
• For the RECV instruction, execute again after
correcting the channels used by own station in the
control data.
• For the RECV instruction, check that 'RECV
execution request flag CH1' (SB0030) to 'RECV
execution request flag CH8' (SB0037) are on.
• If the error occurs again even after taking the above,
please consult your local Mitsubishi representative.
D254H A dedicated instruction which the target station does
not support was executed.
• Change the target station at the station that
executed the SEND instruction.
• If the error occurs again even after taking the above,
please consult your local Mitsubishi representative.
D255H The target station number of the dedicated instruction
is incorrect.
• Execute again after correcting the target station
number in the control data.
• If the error occurs again even after taking the above,
please consult your local Mitsubishi representative.
D256H The execution/error completion type of the dedicated
instruction is incorrect.
• Execute again after correcting the execution/error
completion type in the control data.
• If the error occurs again even after taking the above,
please consult your local Mitsubishi representative.
Error
code
Error details and causes Action Detailed Information
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