Yaskawa MP920 User's Manual Design - Manual (Page 429)

9 Multi-CPU System
9.1.1 Features
9-2
9.1 Overview
This section describes the features of a Multi-CPU System.
9.1.1 Features
A Multi-CPU System can be constructed by mounting two CPU Modules in an MP920 Con-
troller.
With a Multi-CPU System, programs are executed by both CPU Modules. Therefore, in an
application for which there is too much processing for the required scan time for a Single-
CPU System, the total load can be divided between two CPU Modules to shorten the scan
time and improve performance.
In an MP920 Multi-CPU System, the two CPU Modules use the same Power Supply Module
and Mounting Base and each CPU Module can read the data in the other using shared mem-
ory. Accordingly, the system can be made much more compact in comparison with two com-
plete MP920 Controllers.
Fig. 9.1 Multi-CPU System Configuration Example
MP920 Controller with Multiple CPU Modules
Slot
CPU
Module 2 CPU
Module 1
0 1 2 3 4 5 6 7
PS CPU CPU SVA LIO 260IF
Servomotors
SGDM SERVOPACKs