Mitsubishi MELSEC-Q Series User Manual page 168

4
COMMUNICATIONS BETWEEN CPU MODULES
4
- 18 4.1 Communications between CPU modules using CPU shared memory
4.1.2 Communication by auto refresh using CPU shared memory
POINT
The followings are available when selecting the method of setting devices with
each CPU optionally.
• The order of the send range for each module can be changed, since
devices can be set individually.
• The system scan time can be reduced, since it is possible to set for not
performing unnecessary refresh.
(Example 1) When changing the order of send range for each CPU module
The following shows the example performing auto refresh between
High Performance model QCPU of CPU No.1 and Motion CPU of
CPU No.2.
By setting devices optionally, it is possible to match the device of
Performance model QCPU to the fixed device in Motion CPU.
Setting of CPU No.1
Diagram 4.17 Setting of CPU device
CPU No.1
M0
M2000
to
Monitor device
M3055
M3072
Instruction device
to
M3839
Diagram 4.18 Outline of auto refresh operation
Device
M2000
M3055
M3072
M3839
Setting of CPU No.2
CPU No.2
Device
M0
Monitor device
to
(Fixed)
Instruction device
to
(Fixed)