Communications Between Cpu Modules Using Cpu Shared Memory; Cpu Shared Memory - Mitsubishi Electric MELSEC Q Series User Manual

4.1 Communications between CPU modules using CPU shared
memory
This chapter describes communication methods between CPU modules of the multiple CPU system using the CPU
shared memory.
First, the CPU shared memory is described.

4.1.1 CPU shared memory

The CPU shared memory is a memory provided for each CPU module and by which data are written or read
between CPU modules of the multiple CPU system.
The CPU shared memory consists of four areas;
• Host CPU operation information area
• Restricted system area
• Auto refresh area
• User setting area
• Multiple CPU high speed transmission area
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