Mitsubishi QJ71LP21 Reference Manual page 221

8 TROUBLESHOOTING
8 - 10
10) Reason for transmission stop (SW0049)
Displays the causes why the host's data linking (cyclic transmission) was
disabled.
Normal
There is a stop instruction (All)
There is a stop instruction (Own)
Stop instruction present ( )
No Parameter
Illegal Parameter
Host PLC Error
Suspend Communication
[Host status]
11) Inteli-parameter setting (SB0054)
Displays the information of parameters written in the remote I/O station.
• Available/None
12) Reserved station setting (SB0064)
Displays the designation status of reserved stations.
• Yes/No
13) Transmission mode (SB0068)
Displays the link scan status.
• Normal mode
• Constant link scan
14) Duplex transmission setting (SB0069)
Displays the designation status of the multiplex transmission.
• Normal transmission
• Multiplex transmission
"----" is displayed for the bus type system.
15) Duplex transmission status (SB006A)
Displays the status of the multiplex transmission.
• Normal transmission
• Multiplex transmission
"----" is displayed for the bus type system.
REMARK
(1) A station that detected a forward loop error executes the reverse loopback.
(2) A station that detected a reverse loop error executes the forward loopback.
Indication
MELSEC-Q
Description
Communications being executed normally
Cyclic transmission to all stations is stopped
from the host or other station.
Cyclic transmission of the host station is
stopped.
Cyclic transmission of the host station is
stopped from other station (station No.
No parameter can be received.
Set parameters are not correct.
A moderate or major error occurred in the CPU
module of the host station.
Data link error occurred on the host station.
).
8 - 10