Mitsubishi QJ71LP21 Reference Manual page 52

3 SPECIFICATIONS
Remote master station
QCPU
Z.REMFR
Z.REMTO
X1000
Y1018
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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 input/output module.
(b) QCPU uses the dedicated link instructions (REMFR/REMTO instructions)
for directly writing to the buffer memory of the intelligent function module for
the remote I/O station for reading and writing data.
· · · · 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.
Master module
LX/LY
[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 input/output module.
Remote I/O module
1)
2)
3) LX/LY
MELSEC-Q
Remote I/O station
Intelligent
function module
Buffer
memory
X/Y
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