Download Basic Model QCPU(Q Mode)User`s Manual(Function Explanation

10 DEVICES
MELSEC-Q
2)
Although writing is also possible in the "refresh range" portion of the
link device range (specified by the refresh parameters), the link
module's link device data will be rewritten when a refresh operation
occurs.
Therefore, when writing by link direct device, the same data should
also be written to the Basic model QCPU related devices designated
by the refresh parameters.
[Refresh parameter settings]
Network No. : 1
Basic model QCPU(W0 to W3F)
Network module (LW0 to LW3F)
[Sequence program]
MOV K100 W1
"100" is written to link module LW1 when
a refresh occurs.
MOV W1
"100" is written to link module LW1 when
the MOV instruction is executed.
J1\W1
[Writing timing]
Basic model QCPU
MOV K100 W1
MOV W1
J1\W1
Network module
Writing at
instruction
execution
W0
W1
LW1
Writing at instruction execution
Writing at refresh operation
3)
(b)
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When data is written to another station's writing range using a link
direct device, the data which is received from that station will replace
the written data.
Reading
Reading by link direct device is possible in the entire link device range of
network modules.
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