Mitsubishi MELSEC-A Series Reference Manual page 305

10. TROUBLESHOOTING
(1)
(2)
(3)
(4)
(5)
Displaying operation mode of the host station
(a) Displays the operation status of host station
1) ON-LINE........Host station mode setting is ON-LINE (automatic return
function set/not set).
2) OFF-LINE......Host station mode setting is OFF-LINE, SELF-LOOPBACK
TEST, or STATION-TO-STATION TEST.
3) LOOP TEST...Host station mode setting is FORWARD LOOP TEST or
REVERSE LOOP TEST.
(b) The operation display is the same as contents in M9240 and M9252.
Displaying communication status of the host station
(a) Displays the communication status of the host station.
1) P-MTR WAITING..........Awaiting parameter data to be sent from the master
2) OK................................Normal communication is being executed.
3) STOP............................The host station is disconnected and communication
(b) The communication status is the same as contents in M9250 and M9251.
Displaying loop line status of the host station
(a) Displays the forward loop line (F loop) and reverse loop line (R loop) status of
the host station.
Only "OK" is displayed when a MELSECNET/B data link system is used.
1) OK.........Loop line is normal.
2) NG.........Loop line is faulty.
(b) The loop line status is the same as contents in M9241 and M9242.
Displaying loopback execution status
(a) Displays whether loopback has been executed by the host station or not.
1) OK (executed).........Loopback has been executed by the host station.
2) NG (not executed)...Loopback has not been executed by the host station.
(b) The loopback execution status is the same as content in M9243.
Displaying B/W/Y receive status
(a) Displays whether the link relays (B), link registers (W), and link outputs (Y) are
being received from the master station.
1) OK (receiving).........B, W, and Y are being received from the master station
2) NG (not receiving)...B, W, and Y cannot be being received from the master
(b) The B/W/Y receive status is the same as content in M9246.
station.
has been stopped.
by the cyclic communication.
station due to disconnection of host station.
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