Mitsubishi Electric MELSEC Q Series Reference Manual page 72

3 SPECIFICATIONS
Remote master station
QCPU
JP.READ
JP.WRITE
X1000
Y1018
3 - 16
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 I/O module.
(d) The CPU module reads or writes data register D of the remote I/O module
with a link dedicated instruction (READ/WRITE).
To data register D, intelligent function module data are refreshed, using
intelligent function parameters (auto refresh setting).
· · · ·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) 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 settings 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 I/O 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
3 - 16