Chapter 1 Multiple Cpu System; Multiple Cpu System; Overview - Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual

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MULTIPLE CPU SYSTEM

1.1
Multiple CPU System

Overview

What is Multiple CPU system?
A Multiple CPU system is a system in which more than one PLC CPU module and Motion CPU module (up to 4 modules) are
mounted on several main base unit in order to control the I/O modules and intelligent function modules. Each Motion CPU
controls the servo amplifiers connected by SSCNET cable.
System configuration based on load distribution
• By distributing such tasks as servo control, machine control and information control among multiple processors, the flexible
system configuration can be realized.
• You can increase the number of control axes by using a multiple Motion CPU modules. It is possible to control up to 192
axes by using the three CPU modules (R64MTCPU).
• Overall system responsiveness is improved by distributing the high-load processing over several CPU modules.
Communication between CPUs in the Multiple CPU system
• Since device data of other CPUs can be automatically read by the Multiple CPU refresh function, the self CPU can also use
device data of other CPUs as those of self CPU.
• Motion dedicated PLC instructions can be used to access device data from the PLC CPU to Motion CPU and start Motion
SFC program.
1 MULTIPLE CPU SYSTEM
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1.1 Multiple CPU System