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MELSEC-Q
5 PARAMETER SETTINGS
POINT
When the intelligent function module buffer memory is located in several different
areas, the forwarding parameter between devices are convenient when combining
them for access.
READ
CPU module
Master
module
Remote I/O module
Intelligent function
module
Link register W
Data register D
MELSECNET/H
Buffer
memory
1)
2)
3)
Buffer
memory
(1) The buffer memory is refreshed to remote I/O module link register W by the
automatic refreshing of the intelligent function module parameters. (Refer to
Section 5.2.1 (4).)
(2) The buffer memory is transferred from link register W to data register D by
forwarding parameter between devices.
(3) The remote master station can read and write the remote I/O module data
register D using 1 read/write instruction.
If the remote master station makes direct access to the intelligent function module
buffer memory using REMFR/REMTO instructions, the REMFR/REMTO
instructions will implement several cycles of the buffer memory area.
REMFR
CPU module
Master
module Remote I/O module
Intelligent function
module
MELSECNET/ H
Buffer
memory
REMFR
REMFR
Buffer
memory