Mitsubishi Electric MELSEC Q Series User Manual page 163

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 Figure
4.16.íç1
CPU shared memory of
other PLCs
CPU No. 2
CPU No. 1
transmission data
(No.1)
CPU No. 2
transmission data
Maximum
(No.2)
CPU No. 2
2K words
transmission data
(No.3)
CPU No. 2
transmission data
(No.4)
CPU No. 3
CPU No. 3
transmission data
(No.1)
CPU No. 3
transmission data
Maximum (No.2)
CPU No. 3
2K words
transmission data
(No.3)
CPU No. 3
transmission data
(No.4)
Note4.5
CPU No. 4
CPU No. 4
transmission data
(No.1)
CPU No. 4
transmission data
(No.2)
Maximum
CPU No. 4
2K words
transmission data
(No.3)
CPU No. 4
transmission data
(No.4)
Note4.5 Basic
Since the number of CPU modules that can be mounted is up to 3 when using the Basic model QCPU, Q00UCPU,
Q01UCPU, Q02UCPU, there is no CPU No.4.
4 - 17
Setting 1
B0
Read by END processing
of CPU No. 1
to
CPU
CPU
CPU
Setting 2
W0
CPU
CPU
CPU
Setting 3
D0
CPU
CPU
CPU
Setting 4
M0
CPU
CPU
CPU
Figure 4.16 Outline of auto refresh operations using 4 ranges
CPU No. 1
Device
CPU No. 1
Write at END processing
transmission data
(No.1)
No. 2 reception
data (No.1)
No. 3 reception
data (No.1)
No. 4 reception
data (No.1)
CPU No. 1
transmission data
(No.2)
No. 2 reception
data (No.2)
No. 3 reception
data (No.2)
No. 4 reception
data (No.2)
Maximum
8K words
CPU No. 1
transmission data
(No.3)
No. 2 reception
data (No.3)
No. 3 reception
data (No.3)
No. 4 reception
data (No.3)
CPU No. 1
transmission data
No. 2 reception
data (No.4)
No. 3 reception
data (No.4)
No. 4 reception
data (No.4)
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