Mitsubishi MELSEC-Q Series User Manual page 42

1
OUTLINE
(3) System configuration based on load distribution.
Data processing (low speed)
Machine control (high speed)
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All controls are executed with one QCPU.
Empty
memory
(4) Enables system configuration through function distributing
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- 19 1.2 Features of multiple CPU system
(a) Distribution of processing
By distributing the high-load processing performed on a single QCPU over several
CPU modules, it is possible to reduce the overall system scan time.
Diagram 1.8 Distribution of processing
(b) Distribution of memory
It is possible to increase the amount of memory used throughout the entire system
by distributing the memory used over several CPU modules.
Used
memory
Diagram 1.9 Distribution of memory
By distributing the functions, control for production line A and control for production
line B is performed on different CPU modules, allowing easy program development.
(Control in 1ms or less)
CPU module for machine control
Machine control speed is further increased with
load distribution according to the control cycle.
Empty
memory
(Control in several to several dozen ms)
CPU module for data processing
QD75P1 QJ71C24-R2
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Used
Extendable for each CPU module.
memory
Used
memory
One CPU module is added.
Empty
memory
Extension of program memory
Extension of device