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MELSEC-Q
3 SPECIFICATIONS
4) QCPU follows the refresh parameters and refreshes link register W
between QCPU and the master module.
[Input/output]
5) X/Y(LX/LY) is the same as communication with I/O module.
(b) The CPU module reads or writes data using a link dedicated instruction
(REMFR/REMTO).
With a link dedicated instruction (REMFR/REMTO), data are directly read
from or written to the buffer memory of the intelligent function module on the
remote I/O station.
· · · ·This method can be used for the following applications.
• During intelligent function module control, when reading and writing
data with the sequence program only when data is needed.
• When an interlock with the intelligent function module is desired.
• When link register W to remote I/O station is insufficient.
Moreover, this method can be used for reading and writing data when
there is no GX Configurator available.
Refer to Section 7.1.1.for details on the REMFR/REMTO instructions.
Buffer
memory
Z.REMFR
1)
X/Y
LX/LY
3) LX/LY
Y1018
X1000
2)
Z.REMTO
Intelligent
function module
Remote I/O module
QCPU
Master module
Remote master station
Remote I/O station
[Buffer memory]
1) QCPU uses the REMFR instruction to read the contents of the
intelligent function module buffer memory.
2) QCPU uses the REMTO instruction to write the contents in the
intelligent function module buffer memory to the intelligent function
module.
[Input/output]
3) X/Y(LX/LY) is the same as communication with I/O module.