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4. FUNCTIONS
4.2.2
Set attribute
PC CPU
TO
TO
SET
Y(n+1)2
Following
processes
Xn2
Message communication
complete
1)
Set "Set Attribute" in the buffer memory message communication command area using
the sequence program TO instruction.
2)
Set the data to be written in the buffer memory message communication data area using
the sequence program TO instruction.
3)
Turn ON message communication request (Y(n+1)2) to write the data stored in the buffer
memory message communication data area to the special area of the slave station set by
the message communication command area.
4)
When the write operation is complete, the message communication result is stored in the
message communication results area of buffer memory.
5)
When the process result is stored in the message communication results area of buffer
memory, message communication ends and the message communication complete (Xn2)
signal automatically turns ON.
DN91
0110
H
Message
1)
communication
command area
011F
H
0130
H
2)
Message
communication
data area
01A7
H
Message communi-
cation request
0120
H
Message
communication
result area
012F
H
5)
Message communi-
cation complete
−
4
4
MELSEC-A
Slave station (MAC ID)
Class
3)
Iinstance
Attribute
Attribute
Class
Instance
4)
Attribute
Instance
Attribute
Attribute
Class
Instance
Attribute
Attribute
Instance
Attribute
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Troubleshooting
