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MELSEC-Q
3 SPECIFICATIONS
(a) The CPU module reads and writes intelligent function module data at fixed
intervals, using the following devices and setting.
• X/Y (LX/LY) and B/W (LB/LW) devices that are set with common
parameters
• Intelligent function module parameters (auto refresh setting) written to the
remote I/O module
The intelligent function module parameters are created by GX Configurator.
(For more detailed information, refer to the manual for the intelligent
function module you are using.)
· · · ·With this method, a sequence program can be created to allow
communication in the same way as with an intelligent function module
mounted to the same base units as the CPU module.
The analog input values for the analog-digital converter module, the
current values of the high speed counter module and others are
periodically read and suited for periodic writing of the analog output
value for the digital-analog converter module.
POINT
With this method, since data is read and written periodically, there is no interlock
with the intelligent function module.
QCPU
Master module
Intelligent
function module
Remote I/O module
Initial settings
Buffer
memory
LW(W)
2)LW
MOV W0 D0
MOV D10 W10
3)4)
X/Y
LX/LY
5) LX/LY
Y1018
X1000
1)
Remote master station
Remote I/O station
[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 link register W of the remote I/O module.
3) 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.