Mitsubishi MELSEC-Q Series User Manual page 656

14
COMMUNICATIONS BETWEEN CPU MODULES
Motion CPU (Q172DCPU, Q173DCPU)
CPU shared memory
Host CPU operation information area
System area
Data written by MULTW instruction
(User free area)
1. Write by MULTW instruction of
Motion CPU
Motion SFC program
Execution of MULTW instruction
Execution of MULTR instruction
Remark
14
- 20 14.3 Data Communications Using CPU Shared Memory
14.3.3 Data communications without using auto refresh
(c) Between Motion CPU (Q172DCPU, Q173DCPU) and C Controller module
3. Read by QBF_FromBuf
function of C Controller
module
4. Read by MULTR instruction
of Motion CPU
Processing details at motion SFC program execution of Motion CPU
1. The MULTW instruction writes data to the user free area in the CPU shared
memory of the Motion CPU.
4. The MULTR instruction reads the user free area data of the C Controller
module to the specified device of the Motion CPU.
Processing details at bus interface function execution of C Controller module
2. Execution of the QBF_ToBuf function writes data to the user free area of the
C Controller module's CPU shared memory.
3.
Execution of the QBF_FromBuf function reads the user free area data of the
programmable controller CPU to the user program.
Figure 14.15 Processing of communications without using auto refresh
Use the auto refresh area when communicating with a Motion CPU other than the
Q172DCPU or Q173DCPU. (
C Controller module
CPU shared memory
Host CPU operation information area
System area
Auto refresh area
Data written by QBF_ToBuf function
(User free area)
2. Write by QBF_ToBuf function
of C Controller module
User program
Execution of QBF_ToBuf function
Execution of QBF_FromBuf function
Section 14.3.2)