Mitsubishi Electric MELSEC Q Series Reference Manual page 321

8 TROUBLESHOOTING
Error code
F83B Forced switching impossible error
F840 Low speed cyclic parameter error
F841 System 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
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Table 8.1 Error code list (Continued)
Description
Check if the following conditions are met:
 The system is a multiplexed remote I/O network system.
 Check if "Return as a standby station" is set as the parameter for the master
station.
 The host station is operating as a master station.
 The operating sub master station is in data-linking.
Create new network parameters and perform Write to PLC.
If the error reoccurs, the hardware of the CPU or network module is faulty.
Please consult your local Mitsubishi representative.
Create new network parameters and perform Write to PLC.
If the error reoccurs, the hardware of the CPU or network module is faulty.
Please consult your local Mitsubishi representative.
Create new network parameters and perform Write to PLC.
If the error reoccurs, the hardware of the CPU or network module is faulty.
Please consult your local Mitsubishi representative.
The hardware of the network module is faulty.
Please consult 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.
Please consult your local Mitsubishi representative.
The hardware of the network module is faulty.
Please consult 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.
Please consult your local Mitsubishi representative.
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.
Please consult your local Mitsubishi representative.
Check the station number and correct it to the number different from that of
other stations.
The ongoing test was interrupted due to the resetting of the test executing
station.
There is a faulty station on the networks.
MELSEC-Q
Corrective action
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