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9.2 Reading from the CPU Shared Memory of another CPU
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.
*1 : Applicable for the Basic model QCPU and Universal model QCPU
Remark
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