Mitsubishi Electric MELSEC Q Series User Manual page 258

(b) Program example of continuous data writing/reading using the user setting area
from CPU No. 2 to CPU No. 1
Auto refresh device used in CPU No. 2
M63
Program example
Program by which data are continuously written/read using the user setting area from the CPU module of CPU
No. 2 to the CPU module of CPU No. 1.
CPU No. 2
SM400
Always
ON
Write completed
CPU No.1 read completed
CPU No. 1
CPU No.2
write flag
Figure 8.17 Program example for continuously writing/reading data using the user setting area from CPU No. 2 to CPU No. 1
Table8.3 Auto refresh devices used in each CPU module
M31
CHAPTER8 STARTING UP THE MULTIPLE CPU SYSTEM
Auto refresh device used in CPU No. 1
Write
head data
Read
head data
1
2
3
4
5
Write
6
head data
7
Write
final data
8
Write
completion
bit
CPU No.2
write flag
CPU No.2
write flag
CPU No.1
read
completed
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