Mitsubishi Electronics 00UCPU ユーザーズマニュアル

177

APPENDICES

Appendix 2  Compar

ison with a Single CPU System

  

Communications 
among CPU 
modules

Communications by auto 
refresh using the CPU 
shared memory

Not supported

Basic model QCPU = 320 points,
Motion CPU = 2048 points,
C Controller module = 2048 points,
PC CPU module = 2048 points,
Total of all CPU modules: 4416 
points

Communications by 
programs using the CPU 
shared memory 

Not supported

Data communications is performed 
by using the TO, S.TO, FROM 
instructions, and instructions using 
the cyclic transmission area device 
(U3En\G).

Communications between 
Basic model QCPU and 
Motion CPU

Not supported

Data communications is performed 
by using five motion dedicated 
instructions and three multiple CPU 
transmission dedicated instructions.

Page 160, 
Section 6.2, 
Page 162, 
Section 6.3.1

Communications between 
Basic model QCPU and C 
Controller module/PC CPU 
module

Not supported

Data communications is performed 
by using the multiple CPU 
transmission dedicated instruction.

Scan time

Factors that increase scan 
time

• Writing data during RUN
• Time reserved for 

communication processing

• Writing data during RUN
• Time reserved for communication 

processing

• Refresh processing among CPU 

modules in the multiple CPU 
system

• Waiting time

Parameter

Parameters added for a 
multiple CPU system

Not supported

• Number of CPU modules 

("Multiple CPU Setting")

• Control PLC setting ("I/O 

Assignment")

• Out-of-group I/O setting ("Multiple 

CPU Setting")

• Operation mode when a stop 

error has occurred in a CPU 
module ("Multiple CPU Setting")

• Communication area setting 

("Refresh Setting")

• Settings of some parameters 

must be the same for all the CPU 
modules while others can be set 
individually for each CPU module.

Page 80, 
Section 4.2.2, 
Page 170, 
Appendix 1

Precaution

AnS/A series module

Not supported