Reading From The Cpu Shared Memory Of Another Cpu - Mitsubishi MELSEC Q Series Programming Manual

9.2

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.
CPU No. 1
Device
memory
Remark
Refer to Section 7.8.1 for reading the buffer memory of the intelligent function
module with the FROM/DFRO instruction.
Data read
*1
CPU Device
Data
shared memory
read
memory
Reads data
[ FROM H3E1
Designation of CPU shared memory of CPU No. 2
[ FROM H3E0
Designation of CPU shared memory of CPU No. 1
[ FROM H0
Designation of intelligent function module
*1 : Applicable for the Basic model QCPU and Universal model QCPU
Intelligent
CPU No. 2
function module
CPU Buffer
shared memory
memory
n1 n2 D n3]
n1 n2 D n3]
n1 n2 D n3]
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