Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 429

8 TROUBLESHOOTING
Error No.
F822 System error
F823 Parameter consistency error
F825 CPU parameter check error
F826 Parameter mismatch error
F828 No control station shift setting
F829 Pairing setting error
Network type mismatch (normal station
F82A
detected)
Network type mismatch (control station
F82B
detected)
F830 System error
F831 System error
F832 Data link startup condition error
F833 Keyword error
F834 System error
F835 System error
F836 System error
F837 Exceeded number of retries
F838 Relevant timer timeout
No link parameter
F839
(communication impossible)
F83A SW0000 out of range error
F83B Forced switching impossible error
F840 Low speed cyclic parameter error
F841 System error
F842 System error
F843 System error
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Table 8.1 Error code list (continued)
Description of error
The hardware of the CPU or network module is faulty.
Please consult your local Mitsubishi representative.
Set common parameters
of the host station.
If no station-specific parameters are set, the hardware of the CPU or network
module is faulty.
Please consult your local Mitsubishi representative.
Perform Write to PLC on the network parameters for the control station again.
If the error reoccurs, the hardware of the CPU or network module is faulty.
Please consult your local Mitsubishi representative.
Set parameters suitable for the sub control station, or activate it as a control
station.
Review and reset the parameters for the master and sub master stations.
If the error reoccurs, the hardware of the CPU or network module is faulty.
Please consult your local Mitsubishi representative.
Set "with data link by the sub control station when the control station is down."
On the network parameter at control station, set the pairing setting on the
Redundant CPU or unset the pairing setting on all the CPUs other than the
Redundant CPU.
Match the network type set for the normal station with the one set for the control
station.
The hardware of the CPU or network module is faulty.
Please consult your local Mitsubishi representative.
If the data link is stopped under all station specification, start it by all station
specification.
If the data link is stopped under specific station specification, start it from the
station, or forcibly start it.
Start the data link from the station where it was discontinued, or forcibly start it.
The cable is faulty, or the hardware of the network module is faulty.
If a communication error has occurred, review the cable.
If not, the hardware of the network module is faulty.
Please consult your local Mitsubishi representative.
Check the status of the control station and of the remote master station (to see
if resetting or an error occurs in the middle of the operation).
Check the status of the control station and of the remote master station (to see
if resetting or an error occurs in the middle of the operation).
Register link parameters
Correct the contents of SW0000.
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.
Corrective measure
station-specific parameters for the sending range
MELSEC-Q
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