Mitsubishi Electric QJ71LP21 Reference Manual page 216

8 TROUBLESHOOTING
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[Data link information]
5) Total number of link stations
Displays the total number of the link stations set with the parameter plus one
(for the remote master station).
6) Station of maximum normal transmission (SW005A)
Displays the highest station number that is executing the baton pass
normally (the status where the transient transmission is possible).
The T.PASS LED of the network module turns on for stations executing the
baton pass normally.
7) Station of maximum data link (SW005B)
Displays the highest station number that is executing data linking normally
(cyclic transmission and transient transmission).
The D.LINK LED of the network module turns on for stations executing data
linking normally.
8) Transmission status (SW0047)
Displays the communication status of the host.
• Data linking is being executed
• Data linking stopped (other):
Other station stopped the cyclic transmission.
• Data linking stopped (self):
The host stopped the cyclic transmission.
• Baton pass execution (no area):
No assignment of the host's B/W transmission.
• Baton pass execution (abnormal param.):
There is an error in the host's parameters.
• Baton pass execution (param. not received):
The common parameters have not been received.
• Being disconnected (no baton pass):
Duplicate station numbers, cable not connected
• Being disconnected (line error): Cable not connected
• Test being executed: Online/offline test being executed
9) Reason for transmission interruption (SW0048)
Displays the causes why the host cannot communicate (transient
transmission).
For details on actions to take, see Section 8.3, "Error Codes."
• Normal
• Baton duplication
• Baton pass timeout
• Online test being executed
• Baton pass at other station : Baton pass being executed on stations
• Same station number
• Control station duplication
• Offline test being executed
• Others (error code)
: Multiple batons are received.
: The baton does not return on time.
other than the host
: Duplicate station number
: Duplicate control station
MELSEC-Q
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