Mitsubishi Electric MELSEC iQ-R Series User Manual page 105

Error code Classification Error name
(hexadecimal)
8405H Communication
error
8406H Communication
error
8407H Communication
error
Description and cause
Safety Receiving interval monitoring
communication timeout was detected in the
receiving interval safety communication with the
monitoring master station.
timeout
Safety Unacceptable delay was
communication detected in the analysis of the
receive data data received from the master
delay detection station.
Safety A loss was detected in the
communication analysis of the data received
receive data loss from the master station.
detection
Action
• Correct "Transmission interval monitoring time" of the module
parameter as well as "Safety Communication Setting" of the
master station. After that, refer to the following and set module
parameters and perform the safety module validation according
to the parameter setting procedure.
Page 67 Module parameter setting procedure
• Check that the Ethernet cables are not disconnected or cables
are not cut off during safety communication.
• When the parameter setting has no errors, there may be an
influence from noise or a hardware failure. If the same error
occurs again even after measures have been taken against
noise, the module may be in failure. Please consult your local
Mitsubishi representative.
• Correct "Transmission interval monitoring time" of the module
parameter as well as "Safety Communication Setting" of the
master station. After that, refer to the following and set module
parameters and perform the safety module validation according
to the parameter setting procedure.
Page 67 Module parameter setting procedure
• When the parameter setting has no errors, there may be an
influence from noise or a hardware failure. If the same error
occurs again even after measures have been taken against
noise, the module may be in failure. Please consult your local
Mitsubishi representative.
10 TROUBLESHOOTING
10.7 Error Code List
10
103