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4 FUNCTIONS
Programmable controller CPU
4 - 10
(3) Reading communication error information
TO
SET Y12
FROM
X02
X05
FROM
X02
X05
Message Comm.
Completion
The status of each slave station is stored during I/O communication.
1)
Set command data in Message Communication Command (address:
0110
H
2)
When Message Communication Request (Y12) is set to ON, the
communication error information of the relevant slave node, which has
been accumulated in the QJ71DN91, is stored in Message
Communication Data (address: 0130
3)
Upon completion of reading, the processing result is stored in
Message Communication Result (address: 0120
Message Communication Completion (X02) is set to ON.
4)
The slave node's communication error information stored in Message
Communication Data (address: 0130
programmable controller CPU.
5)
If failed, Message Communication Error Signal (X05) is set to ON.
Read data in Message Communication Result (address: 0120
012F
H
QJ71DN91
0110
H
Message
1)
Comm.
Command area
011F
H
Message Comm.
2)
Request
Slave
information
storage area
0120
H
5)
Message
Comm.
Result area
012F
H
0130
H
Message
Comm.
Data area
01A7
H
3)
Message
communication
complete
4)
to 011F
).
H
) to identify the cause of the error.
MELSEC-Q
Slave node (MAC ID)
I/O
Class 1
communication
Instance
Attribute
Attribute
Instance
2)
Attribute
Attribute
Attribute
Class
Instance
Attribute
Attribute
Attribute
Instance
Attribute
to 01A7
).
H
H
to 012F
), and
H
H
to 01A7
) is read out to the
H
H
to
H
4 - 10
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Troubleshooting
