Mitsubishi Electric Q12DCCPU-V - Data Communications Using Auto Refresh; Communication Using Auto Refresh

13
COMMUNICATIONS BETWEEN CPU MODULES
13.3 Data Communications Using CPU Shared Memory
13.3.2 Data communications using auto refresh
13 - 17
9
DEVICE DESCRIPTION
10
MULTIPLE CPU SYSTEM OVERVIEW
11
MULTIPLE CPU SYSTEM CONFIGURATION
12
CONCEPT OF MULTIPLE CPU SYSTEM
13
COMMUNICATIONS BETWEEN CPU MODULES
14
PARAMETERS ADDED FOR MULTIPLE CPU SYSTEMS
15
STARTING A MULTIPLE CPU SYSTEM
16
TROUBLESHOOTING
13.3.2 Data communications using auto refresh
This section explains the processing and setting for communicating data with a
programmable controller CPU or Motion CPU, using the CPU shared memory and auto
refresh.
(1) Data communications using auto refresh
The following shows the processing of data communication when using auto refresh.
Figure 13.12 Communication using auto refresh
Q12DCCPU-V
Q06CCPU-V
Q06CCPU-V-B
CPU shared memory
Host CPU operation information area
System area
Auto refresh area for programmable
controller CPU (Motion CPU)
User setting area
1. Write by END processing
of programmable controller CPU
(Motion CPU)
Device
For programmable controller CPU (Motion CPU)
For C Controller module
Programmable controller CPU, Motion CPU
Host CPU operation information area
System area
Auto refresh area for
C Controller module
User setting area
CPU shared memory
User program
Execution of QBF_FromBuf function
Execution of QBF_ToBuf function
2. Write by QBF_ToBuf function
of C Controller module
C Controller module
3. Read by QBF_FromBuf
function of C Controller module
4. Read by END processing
of programmable controller
CPU (Motion CPU)
In END processing of programmable controller CPU or Motion CPU
Data in the device for programmable controller CPU (or Motion CPU) are
transferred to the auto refresh area in the CPU shared memory.
Auto refresh area data in the C Controller module are transferred to the
device for C Controller module in the programmable controller
CPU (or Motion CPU).
1.
4.
2.
3.
QBF_ToBuf function execution transfers user program settings to the auto
refresh area in the C Controller module's CPU shared memory.
QBF_FromBuf function execution transfers the auto refresh area data of
the programmable controller CPU (or Motion CPU) to the user program.
At bus interface function execution of C Controller module