Mitsubishi QJ71LP21 User Manual

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

Mitsubishi QJ71LP21 Specifications

General

Brand	Mitsubishi
Model	QJ71LP21
Category	Controller
Language	English