Network Diagnostics (Network Monitor) - Mitsubishi Electric QJ71LP21 Reference Manual

8 TROUBLESHOOTING

8.1 Network Diagnostics (Network Monitor)

The status of the remote can be checked using the network diagnostic function of GX
Developer.
When an error occurs, the faulty station can be identified using the host information,
other station information, and error history monitor functions of the network.
GX Developer network diagnosis can be implemented for the remote master station
and remote I/O station
The following lists the items that can be checked with the network diagnostic function.
Network diagnostics
To next page
8 - 2
1.
1: Use GX Developer Version 6.01B or later when executing network diagnosis from
the remote I/O station.
Host information
[Network information]
• Network type
• Network No.
• Group No.
• Station No.
[Link information]
• Mod
• Forward loop status (including loopback station)
• Reverse loop status (including loopback station)
• Link scan time (maximum, minimum, current)
[Communication information]
• Communication status
Other station information [Network information]
[Other station information]
[Network information]
Network monitor details
[Remote master station information]
[Data link information]
• Network type
• Module No.
• Network No.
• Group No.
• Station No
• Communication status of each station
• Data-link status of each station
• Parameter status of each station
• CPU operation status of each station
• CPU RUN status of each station
• Loop status of each station
• Reserved station designation of each station
• PSU operation status of each station extension
• Search status of local station error
• Each station PLC operation mode status
• Each station paring status
• Each station PLC system status
• Network type
• Module No.
• Network No.
• Group No.
• Station No.
• Assign remote master station
• Present remote master station
• Transmission information
• Remote sub-master station communication
• Remote I/O master station number (block 1, block 2)
• LX/LY alocations
• Total number of linked stations
• Station of maximum normal transmission
• Station of maximum data link
• Transmission status
• Reason for transmission Interruption
• Reason for transmission stop
2: When PLC to PLC network is diagnosed,
this information is effective.
MELSEC-Q
2
8
2
2
8 - 2