Multiple Cpu High Speed Transmission Area; Settings Required For Auto Refresh - Mitsubishi Electric Q12DCCPU-V User Manual

13
COMMUNICATIONS BETWEEN CPU MODULES
1) Multiple CPU
No. Name
Multiple CPU high speed
1)
transmission area
2) CPU No.n send area
3) User setting area
4) Auto refresh area
Remark
13.3.3 Communication using the multiple CPU high speed transmission area and auto refresh
(c) Memory structure of the multiple CPU high speed transmission area
The following explains memory structure of the multiple CPU high speed
transmission area in the CPU shared memory.(
high speed
transmission area
Figure 13.18 Memory structure of the multiple CPU high speed transmission area
Table 13.12 Multiple CPU high speed transmission area
• The area for data communications between CPU modules in
a multiple CPU system.
• An area of up to 14K words is divided into sub-areas for
respective CPU modules in a multiple CPU system.
• The area where send data of each CPU module are stored.
• Data stored in the host CPU's send area are sent to another
CPU.
• Data received from another CPU are stored in the send area
for another CPU.
• The area for communicating data with other CPUs using
cyclic transmission area devices.
• Accesses are performed with the user program that uses
cyclic transmission area devices.
• The area for communicating device data with other CPUs
using auto refresh.
(d) Settings required for auto refresh
To perform auto refresh, the points of data to be sent from each CPU module must
be set in "Multiple CPU high speed transmission area setting" in <<Multiple CPU
settings>> of C Controller setting utility.
For C Controller setting utility, refer to the following.
C Controller Module User's Manual (Utility Operation, Programming)
13.3 Data Communications Using CPU Shared Memory
2) CPU No.1 send area
2) CPU No.2 send area
2) CPU No.3 send area
2) CPU No.4 send area
Description
Page 13-14, Section 13.3.1)
3) User setting area
4) Auto refresh area
Size
Setting Setting
range unit
0 to 14K
1K word
words
0 to 14K
1K word
words
0 to 14K
2 words
words
0 to 14K
2 words
words
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