Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 426

8 TROUBLESHOOTING
Error No.
F706 Received data size error
F707 Number of relay stations invalid
F708 Receiving group number error
F709 Receiving network number error
F70A System error
F70B Response wait timeout
F70C System error
F70E System error
F710 System error
F711 System error
F712 System error
F781 Connection target specification error
F782 System error
F783 System error
F7C1 Host station channel in use
F7C2 Target station channel in use
8 - 42
Table 8.1 Error code list (continued)
Description of error
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.
Set stations to which data can be sent.
Review the system.
Review the routing parameters.
Review the group number of the target station.
Review the network No. of network parameter for a host station and a target
station.
If the parameter is not set, the network No. is preset to 1 (default); so check the
network No. of other stations.
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.
Wait until SB0047 (baton pass status) and SB0049 (data link status) are
recovered.
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.
The hardware of the network module is faulty.
Please consult your local Mitsubishi representative.
Check if C24 connection or CC-Link connection is specified for access to other
stations.
If the setting is correct, the hardware of the CPU or network module is faulty.
Please consult your local Mitsubishi representative.
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.
The same channel cannot be used at the same time.
Change the channel number.
Alternatively, do not use the same channel at the same time.
Retry the SEND instruction after a little while.
Check if the target station uses the channel concerned to execute the
instruction, or if RECV processing is executed.
Check if another station executes the SEND instruction to the target station's
channel.
MELSEC-Q
Corrective measure
8 - 42