Mitsubishi MELSEC-Q Series User Manual page 167

4
COMMUNICATIONS BETWEEN CPU MODULES
CPU shared memory of
other PLCs
CPU No. 2
Maximum
2K words
CPU No. 3
Maximum
2K words
Basic
CPU No. 4
Note4.5
Maximum
2K words
Note5
Since the number of CPU modules that can be mounted is up to 3 when using the Basic model
Basic
QCPU, there is no CPU No.4.
Note4.5
4) When the auto refresh operations are divided into four ranges (Setting 1: Link
relay (B), Setting 2: Link register (W), Setting 3: Data register (D), Setting 4:
Internal relay (M)), the outline is as shown in Diagram
Read by END processing
of CPU No. 1
CPU No. 1
transmission data
(No.1)
CPU No. 2
transmission data
(No.2)
CPU No. 2
transmission data
(No.3)
CPU No. 2
transmission data
(No.4)
CPU No. 3
transmission data
(No.1)
CPU No. 3
transmission data
(No.2)
CPU No. 3
transmission data
(No.3)
CPU No. 3
transmission data
(No.4)
Note 4.2
CPU No. 4
transmission data
(No.1)
CPU No. 4
transmission data
(No.2)
CPU No. 4
transmission data
(No.3)
CPU No. 4
transmission data
(No.4)
Diagram 4.16 Outline of auto refresh operations using 4 ranges
4.1 Communications between CPU modules using CPU shared memory
4.1.2 Communication by auto refresh using CPU shared memory
CPU No. 1
Device
Setting 1
B0
CPU No. 1
Write at END processing
transmission data
to
(No.1)
CPU No. 2 reception
data (No.1)
No. 3 reception
CPU
data (No.1)
No. 4 reception
CPU
data (No.1)
Setting 2
W0
CPU No. 1
transmission data
(No.2)
No. 2 reception
CPU
data (No.2)
CPU No. 3 reception
data (No.2)
No. 4 reception
CPU
data (No.2)
Maximum
Setting 3
8K words
D0
CPU No. 1
transmission data
(No.3)
No. 2 reception
CPU
data (No.3)
No. 3 reception
CPU
data (No.3)
No. 4 reception
CPU
data (No.3)
Setting 4
M0
CPU No. 1
transmission data
No. 2 reception
CPU
data (No.4)
No. 3 reception
CPU
data (No.4)
CPU No. 4 reception
data (No.4)
4.16.Note5
CPU shared memory
CPU No. 1
transmission data
(No.1)
CPU No. 1
transmission data
(No.2)
CPU No. 1
Maximum
transmission data
2K words
(No.3)
CPU No. 1
transmission data
(No.4)
User setting area
4
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