Mitsubishi Electric QJ71LP21 Reference Manual page 238

Q corresponding melsecnet/h network system
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8 TROUBLESHOOTING
Error No.
Description of error
F842
System error
F843
System error
F901
System error
F902
System error
F903
System error
F904
System error
F905
System error
FD01
CRC error (offline test)
FD02
Overrun error (offline test)
FD03
AB. IF error (offline test)
FD04
TIME error (offline test)
FD05
Data error (offline test)
FD06
Under error (offline test)
FD07
Send failure
FD08
Send failure (coaxial bus system)
FD09
Loop status changed (offline loop test)
FD0A
Unstable communication (offline loop test)
FD0B
Wiring error (offline loop test)
FD0C
System error
FD11
Error occurred during test execution
FD12
Disconnecting error
FD13
System error
FD14
System error
FD15
System error
FD16
System error
FD17
System error
FD18
System error
FD19
System error
FD1A
Station with duplicated station number
FD1B
Test abort error
Interruption error due to loop switching
FD1C
during test
FD1D
System error
FD1E
Bus topology, test disabled error
FD20
Mode error
8 - 31
Table 8.1 Error code list (Continued)
Create and write network parameters to the PLC.
If the error recurs, the hardware of the CPU or network module is faulty.
Contact your local Mitsubishi representative.
Create and write network parameters to the PLC.
If the error recurs, the hardware of the CPU or network module is faulty.
Contact your local Mitsubishi representative.
The hardware of the network module is faulty.
Contact your local Mitsubishi representative.
Check the system configuration to see if there are eight or more relay networks
in the MELSECNET/H.
The hardware of the CPU or network module is faulty.
Contact your local Mitsubishi representative.
The hardware of the network module is faulty.
Contact your local Mitsubishi representative.
There is no need to take corrective measures because the system retries the
operation.
If the error frequently occurs, check for faulty cables, faulty hardware, noise,
absence of terminating resistor (in the case of the bus), and incorrect wiring.
Check if a coaxial cable is not connected or is loose or faulty and if the
terminating resistor is not connected.
There is no need to take corrective measures because the system retries the
operation (do not switch the loop in the middle of the operation).
If the error frequently occurs, check the line and the wiring status.
Check the wiring.
There is a problem with the hardware of the network module.
Contact our branch office or agency responsible for your area.
Execute after the completion of the test from other station.
Review the cause for why the station is being disconnected.
Set the total number of link stations with a common parameter.
Set a station number that is equal to the host station number or larger.
The hardware of the network module is faulty.
Contact your local Mitsubishi representative.
Check the duplicate station number, and correct it.
The ongoing test was interrupted due to the resetting of the test executing
station.
There is a faulty station on the networks.
There is no need to take corrective measures because the system retries the
operation (do not switch the loop in the middle of the operation).
If the error frequently occurs, check the line and the wiring status.
The hardware of the network module is faulty.
Contact your local Mitsubishi representative.
Conduct a test that can be executed in the bus topology.
Create and write new network parameters to the PLC.
If the error recurs, the hardware of the CPU or network module is faulty.
Contact your local Mitsubishi representative.
Corrective measure
MELSEC-Q
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