Справочник Пользователя для Mitsubishi Electronics MELSEC -Q/L
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9 MULTIPLE CPU DEDICATED INSTRUCTIONS
9.2 Reading from the CPU Shared Memory of Another CPU
9.2 Reading from the CPU Shared Memory of Another CPU
9.2
Reading from the CPU Shared Memory of Another
CPU
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.
• 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 Page 506 Reading 1-word data from the intelligent function module, reading 2-word data from the
intelligent function module for reading the buffer memory of the intelligent function module with the FROM/
DFRO instruction.
intelligent function module 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
memory
CPU
shared
memory
shared
memory
Device
memory
memory
Buffer
memory
memory
CPU
shared
memory
shared
memory
CPU No. 1
CPU No. 2
Intelligent
function module
function module
Data
read
read
Data read