Mitsubishi MELSEC Q Series Programming Manual page 881

(2) Operation of the TO instruction
The TO instruction can write device memory data to the following memories.
• CPU shared memory of host CPU module
• Buffer memory of intelligent function module
The following figure shows the processing performed when the TO instruction is executed in
CPU No. 1.
CPU No. 1
Device CPU
Data
memory shared
write
memory
Both of the S.TO and TO instructions can be used for the Basic model QCPU
(Q00CPU or Q01CPU) and Universal model QCPU to write data to the CPU
shared memory. However, use of the TO instruction is recommended, since use of
S.TO instruction reduces the number of steps and processing time.
Remark
Refer to Section 7.8.2 when writing to the buffer memory of the intelligent function
module by the TO instruction.
CPU No. 2
Device CPU
memory shared
memory
Writes data
[ TO H3E0 n2 n3 ]
S
Designation of CPU shared memory in CPU No. 1
[ TO H0 n2 n3 ]
S
Designation of intelligent function module
Intelligent
function module
Buffer
memory
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