Mitsubishi Electric QJ71LP21 Reference Manual page 53

3 SPECIFICATIONS
Remote master station
QCPU
JP.READ
JP.WRITE
X1000
Y1018
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4) Link register W, follows the common parameters set in the remote
master station for communication between the remote master station
and the remote I/O station.
5) Link register W between the master module and QCPU are refreshed.
[Input/output]
6) X/Y(LX/LY) is the same as communication with input/output module.
(d) The CPU module uses the intelligent function module parameter automatic
refresh settings to write the intelligent function module data that has been
refreshed in data register D of the remote I/O station network module using
dedicated link instructions (Read/Write instructions).
· · · · 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 link register W to remote I/O station is insufficient.
For details on the read/write instructions, refer to the Q-corresponding
MELSECNET/H network system reference manual (PLC to PLC network).
Master module
LX/LY
[Buffer memory]
1) The GX Configurator is used to write the initial settings for the
intelligent function module and the automatic refresh settings to the
remote I/O station remote I/O module.
2) The remote I/O module follows the automatic refresh contents and
refreshes the data in the buffer memory of the intelligent function
module to the data register D of the remote I/O module.
3) QCPU uses the read/write instructions to read and write to remote I/O
module data register D.
[Input/Output]
4) X/Y(LX/LY) is the same as communication with input/output module.
Remote I/O module
Initial settings
4)
6) LX/LY
MELSEC-Q
Remote I/O station
Intelligent
function module
1)
Buffer
2)
D
memory
X/Y
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