Mitsubishi Electric FR-A820-00046 Instruction Manual page 1077

Protective functions
Operation panel
indication
Name
Description
Check point
Corrective action
FR-A800
E.EHR
Ethernet communication fault (FR-A800-E only)
Appears when Ethernet communication is interrupted by physical factors while Pr. 1431
"Ethernet signal loss detection function selection" = "3".
The inverter trips when Ethernet communication is cut off for the time set in Pr. 1432
"Ethernet communication check time interval" or longer between the inverter and all
devices with the IP addresses in the range specified for the Ethernet command source
selection (Pr. 1449 to Pr. 1454).
Stops the inverter output when excessive noise occurs around the inverter.
When the CC-Link IE Field Network Basic is used, the inverter output is shut off when the
data addressed to the own station is not received for the predetermined timeout period or
longer, or when the status bit of the cyclic transmission addressed to the own station turns
OFF (when the master controller gives a command to stop the cyclic transmission). (For the
details of the timeout period, status bit of the cyclic transmission, and command to stop the
cyclic transmission, refer to the Instruction Manual of the master controller which supports
the CC-Link IE Field Network Basic.)
Check that the Ethernet board is installed onto the connector securely.
Check for a break in the Ethernet cable.
Check that the Pr. 1432 setting is not too short.
Check for excessive noise around the inverter.
When the CC-Link IE Field Network Basic is used, check that the timeout period set in the
master is not shorter than the period during which the inverter does not receive the data
addressed to the own station.
When the CC-Link IE Field Network Basic is used, check that the status bit of the cyclic
transmission addressed to the own station is not OFF.
Connect the Ethernet board securely.
Check that the Ethernet cable is correctly connected to the Ethernet connector. Check that
the Ethernet cable is not broken.
Set a larger value in Pr.1432.
When excessive noise occurs around the inverter, change the communication setting of the
master. (The noise may be reduced by setting a shorter timeout period or increasing the
number of retries in the communication setting of the master.)
When the CC-Link IE Field Network Basic is used, set a timeout period longer than the period
during which the inverter does not receive the data addressed to the own station.
When the CC-Link IE Field Network Basic is used, turn ON the status bit of the cyclic
transmission addressed to the own station.
Causes and corrective actions
FR-LU-08 Ethernet comm fault
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