Chapter 14 Functions Used By Multiple Cpu System; Data Communications Using Cpu Shared Memory - Mitsubishi Electric MELSEC Q Series User Manual

CHAPTER 14
This chapter describes control/access functions of the C Controller module and programmable controller CPU/Motion
CPU in the multiple CPU system.
Remark
For details of each function, install Setting/monitoring tools for the C Controller module and refer to the [C Controller module
function help].
14.1

Data Communications Using CPU Shared Memory

Data communication using the CPU shared memory can be used between the C Controller module and the CPU
modules by creating a user program with the bus interface function.
Remark
Shared CPU memory can be used only in the multiple CPU configuration.
(1) Data communication methods using the CPU shared memory
There are the following three kinds of the communication methods.
• Using the auto refresh. (Page 256, Section 14.1.2)
• Using the multiple CPU high speed transmission area. (Page 261, Section 14.1.3)
• Not using the auto refresh. (Page 266, Section 14.1.4)
Note14.1
Q24DHCCPU-LS
When using Q24DHCCPU-LS and Q26DHCCPU-LS, the CPU shared memory can be accessed by the data refresh
function.
FUNCTIONS USED BY
MULTIPLE CPU SYSTEM
Q26DHCCPU-LS

CHAPTER 14 FUNCTIONS USED BY MULTIPLE CPU SYSTEM

Q24DHC-V Q24DHC-VG Q24DHC-LS
Note14.1
Note14.1
14
Q26DHC-LS Q12DC-V
251