Mitsubishi MELSEC Q Series User Manual

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14.3 Data Communications Using CPU Shared Memory
14.3.2 Data communications using auto refresh
14
COMMUNICATIONS BETWEEN CPU MODULES
14.3.2 Data communications using auto refresh
This section explains the processing and setting for data communications using CPU
shared memory and the auto refresh of the programmable controller CPU and Motion
CPU.
(1) Processing of data communications using auto refresh
The following shows the processing of data communications made using auto refresh.
POINT
Auto refresh in 4. of Figure 14.10 is performed in the END processing of the
programmable controller CPU (Motion CPU) after execution of the QBF_ToBuf
function in 2. of Figure 14.10.
Figure 14.10 Processing of communications using auto refresh
CPU shared memory
Host CPU operation information area
System area
Auto refresh area for programmable
controller CPU (Motion CPU)
User free 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 free 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)
Processing details at END processing of programmable controller CPU or
Motion CPU
The device data for the programmable controller CPU (Motion CPU) is
transferred to the auto refresh area of the CPU shared memory of the
programmable controller CPU (Motion CPU).
The auto refresh area data of the C Controller module is transferred to
the C Controller module device of the programmable controller CPU
(Motion CPU).
1.
4.
Processing details at bus interface function execution of C Controller module
Execution of the QBF ToBuf function transfers the settings of
the user program to the auto refresh area of the C Controller module's CPU
shared memory.
Execution of the QBF FromBuf function transfers the auto refresh area data
of the programmable controller CPU (Motion CPU) to the user program.
2.
3.

Mitsubishi MELSEC Q Series Specifications

General

Brand	Mitsubishi
Model	MELSEC Q Series
Category	Controller
Language	English