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10 TROUBLESHOOTING
10.7 List of Error Codes
Error codes related to CC-Link IE TSN safety communications
The CC-Link IE TSN safety communications error codes are shown below.
The ERR. LED does not turn on when an error related to CC-Link IE TSN safety communications occurs, the same as when a
CC-Link IE TSN communication error occurs.
When a CC-Link IE TSN safety communications error occurs, the SAFETY LED turns off and the D LINK LED does not
change.
List of Error Codes
Error code
(hexadecimal)
Classification Error name Description and cause Action
8400H Communication
error
Safety
communication error
An error was detected in the
safety communication with the
master station.
• Set module parameters and perform the safety
module validation according to the parameter setting
procedure. ( Page 65 Safety Communication
Setting)
• 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.
8401H Communication
error
Safety
communication
disabled due to a
communication
interrupt
A communication interrupt has
occurred on CC-Link IE TSN and
safety communications stopped.
• Check the network status using the CC-Link IE TSN/
CC-Link IE Field diagnostics of GX Works3 for errors.
• When no error has occurred on the network, 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.
8402H Communication
error
Safety
communication
connection being
established,
Response monitoring
timeout
Response monitoring timeout was
detected while the safety
connection was being established
in the safety communication with
the master station.
• 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 57 Parameter Setting)
• 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.
8403H Communication
error
Safety
communication being
refreshed, Response
monitoring timeout
Response monitoring timeout was
detected while the safety
communication was being
refreshed in the safety
communication with the master
station.
8404H Communication
error
Safety
communication error
in processing,
Response monitoring
timeout
Response monitoring timeout was
detected while a safety
communication error was being
processed in the safety
communication with the master
station.
8405H Communication
error
Safety
communication
receiving interval
monitoring timeout
Receiving interval monitoring
timeout was detected in the safety
communication with the master
station.
8406H Communication
error
Safety
communication
receive data delay
detection
Unacceptable delay was detected
in the analysis of the data
received from the master station.
8407H Communication
error
Safety
communication
receive data loss
detection
A loss was detected in the
analysis of the data received from
the master station.
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