Mitsubishi Electric QJ71LP21 Reference Manual page 214

8 TROUBLESHOOTING
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2) Data-Link status of each station (SW0074 to 77)
Displays the status of the cyclic transmission.
• Normal display
• Highlighted display
3) Parameter status of each station
Displays the parameter communication status of each station (SW0078 to
7B).
• Normal display
• Highlighted display
Displays the abnormal parameter status of each station (SW007C to 7F).
• Normal display
• Highlighted display
4) CPU operation status of each station (SW0080 to 83, SW0088 to 8B)
The operation status of the remote I/O module is displayed.
• Normal indication
• Reversed indication : Error
5) Loop status of each station (SW0091 to 94, SW0095 to 98)
Displays the status of the forward/reverse loops in case of the optical loop
system.
• Normal display
• Highlighted display
6) Reserved station designation each station (SW0064 to 67)
Displays the setting status of a reserved station.
• Normal display
• Highlighted display
7) PSU operation status of each station extension (SW008C to 8F)
Displays the supply status of the external power 24 V DC of the network
module.
• Normal display
• Highlighted display
: Normal station or reserved station
: Abnormal station (data link not executed)
: During parameter communication
: Other than during parameter communication or
reserved station
: Normal parameter, reserved station or
unconnected station
: Abnormal parameter
: Normal, reserved station, and unconnected station
: minor
Severe : moderate (WDT error etc.),
major (hardware error etc.)
: Normal or reserved station
: Abnormal or unconnected station
: Unreserved station
: Reserved station
: Not powered by 24 V DC or network module
without supply terminal
: 24 V DC powered
MELSEC-Q
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