Mitsubishi MELSEC-A Series Reference Manual page 306

10. TROUBLESHOOTING
(6)
(7)
Displaying B/W receive status (local station in three-tier system) (M9247)
(a) Displays whether a local station in the three-tier system is receiving the link
relays (B) and link registers (W) from the master station in the two-tier system.
1) OK (receiving).........B and W are being received from the master station in
2) NG (not receiving)...The local station is in a status in which B and W are not
Displaying local station operation status (D9248 to 9251, D9252 to D9255)
(a) Displays the operation status of the local station.
1) RUN: Station in RUN status
2) STOP: Station in STOP status
3) DOWN: Station is disconnected from the link due to power supply OFF
(b) The operation status of the station number part of remote I/O stations will always
be RUN regardless of normal status or power supply OFF etc.
the two-tier system by the cyclic communication.
being received from the master station in the two-tier
system.
Reception will be disabled when M9247 is turned ON.
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