Справочник Пользователя для Mitsubishi Electronics QCPU

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.2 Reading fro

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 the CPU Shar

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Reading from the CPU Shared Memory of another CPU

The FROM(P)/DFRO(P) instruction of Multiple CPU system can be read from the following 
memories.
• Buffer memory of intelligent function module
• CPU shared memory of other CPU module
• CPU shared memory of host CPU module (applicable for the Basic model QCPU and 

Universal model QCPU)

The following figure shows the processing performed when the FROM(P) instruction is executed 
in CPU No. 1.

*1 : Applicable for the Basic model QCPU and Universal model QCPU

Refer to Section 7.8.1 for reading the buffer memory of the intelligent function 
module with the FROM/DFRO instruction.

Designation of CPU shared memory of CPU No. 2

[ FROM   H3E1    n1   n2   D   n3]

Reads data

*1

Designation of CPU shared memory of CPU No. 1

Designation of intelligent function module

[ FROM   H3E0      n1   n2   D   n3]

[ FROM   H0      n1   n2   D   n3]

Device 
memory

CPU 
shared 
memory

Device 
memory

Buffer 
memory

CPU 
shared 
memory

CPU No. 1

CPU No. 2

Intelligent 
function module

Data 
read

Data read