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MELSEC-Q
16 COMMUNICATION BETWEEN CPU MODULES IN MULTIPLE PLC
SYSTEM
(2) System area (200
H
to 7FF
H
)
The area used by the High Performance model QCPU, Motion CPU and PC CPU
module systems (OS.) This is used by the OS when communication dedicated
instructions between multiple PLCs are executed.
(3) Automatic refresh area
The area used when the multiple PLC system is automatically refreshed. Writing
is not enabled with the S. TO instruction, and reading is not enabled with the
FROM instruction or intelligent function module device (U
\G ).
(4) User's free area
The area for performing communication between CPU modules with the multiple
PLC system's S. TO instruction, FROM instruction and intelligent function module
device (U
\G ).
The area used after the number of points set for automatic refresh is used.
(An area between 800
H
and FF
H
can be used as the user's free area when
automatic refresh is not being performed.)
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