Mitsubishi Electric MELSEC Q Series Reference Manual page 286

8 TROUBLESHOOTING
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[Link information]
5) Mode (SW0043)
The operation mode of the host station is displayed.
• Online
• Offline
• Forward loop test
• Reverse loop test
• Station-to-station test (Station that executes tests)
• Station-to-station test (Station to be tested)
6) F loop status (SB0091), Loopback station (SB0099)
The status on the forward loop side is displayed.
• F loop status
• Loopback station
"---" is displayed for the bus type.
7) R loop status (SB0095), Loopback station (SB009A)
The status on the reverse loop side is displayed.
• R loop status
• Loopback station
"---" is displayed for the bus type.
8) Link scan time (SW006B/SW006C/SW006D)
The maximum/minimum/current values of the link scan time of the host
station are displayed.
Constant link scan
Not set
Set
[Communication information]
9) Communication status (SB0047)
The communication status of the host station is displayed.
• Data link being executed (SB0047: Off)
• Data link stopped (SB0047: On)
POINT
The link information and communication information of the multiplexed remote sub-
master station are not displayed.
: Normal/Abnormal
: Unused/"Station number where loopback is
executed"
: Normal/Abnormal
: Unused/"Station number where loopback is
executed"
Station type
Remote master station
Actual measurement value (The actual
maximum/minimum/current values are displayed.)
Actual measurement value (The actual
maximum/minimum/current values are
displayed.)
MELSEC-Q
(Unit [ms])
Remote I/O
station
Constant link
scan 2 ms
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