Mitsubishi MELSEC-Q Series User Manual page 264

8
STARTING UP THE MULTIPLE CPU SYSTEM
(3) Example of continuous data transmission from CPU No. 1 to No. 2
SM400
Always
CPU No.1
transmission
ON
flag
CPU No.2
reception
completed
CPU No. 2
CPU No.1
transmission
flag
Diagram 8.14 Program example for storing data continuously from CPU No. 1 to CPU No. 2
8
- 31 8.3 Communication program examples using auto refresh
8.3.1 Program examples for the Basic model QCPU, High Performance model QCPU and Process CPU
Table8.2 Auto refresh devices used in each module
Auto refresh devices used in CPU No. 1
D10 to D18
For handshake in CPU Nos. 1 and 2, refer to Section 4.1.2.
Program example
Program by which data are continuously stored from CPU No. 1 to CPU No. 2
CPU No. 1
Auto refresh devices used in CPU No. 2
D10 to D18
M40
Transmission CPU No.1
head data transmission
data
CPU No.1 CPU No.2
transmission reception
data data
Transmission
head data
Transmission
final data
CPU No.1
transmission
flag
CPU No.1
transmission
flag
CPU No.2
reception
completed