Mitsubishi Electric QJ71LP21 Reference Manual page 52

3 SPECIFICATIONS
Remote master station
QCPU
MOV W0 D0
MOV D10 W10
X1000
Y1018
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(c) The CPU uses the X/Y(LX/LY) and B/W(LB/LW)devices set by the common
parameters and the automatic refresh settings for the intelligent function
module parameters that where written in the remote I/O station to
periodically read and write intelligent function module data.
The difference between this and (a) is that with the automatic refresh
settings for the intelligent function module parameters, the automatic
refresh destination of the intelligent function module is network module data
register D. Data register D, uses the PLC parameters for the network
module to transmit to link register W among devices.
· · · · 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 value for the analog input module, current value for
the high-speed count module and others are periodically read to suit
the analog output module analog output value being periodically
written.
In addition, there is no need to revise the intelligent parameters even if
the network parameters for the remote master station are changed.
Master module
5) LW
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) The remote I/O module uses transfer among devices for the PLC
parameters written to the host to send data register D to link register
W.
Remote I/O module
Initial settings
4) W
6) LX/LY
MELSEC-Q
Remote I/O station
Intelligent
function module
1)
Buffer
3) D 2)
memory
X/Y
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