14
COMMUNICATIONS BETWEEN CPU MODULES
14.3 Data Communications Using CPU Shared Memory
14.3.2 Data communications using auto refresh
14 - 14
9
UTILITY OPERATION
10
FUNCTIONS AND
PROGRAMMING
11
OVERVIEW OF
MULTIPLE CPU
SYSTEM
12
MULTIPLE CPU
SYSTEM
CONFIGURATION
13
MULTIPLE CPU
SYSTEM
CONCEPT
14
COMMUNICATIONS
BETWEEN CPU
MODULES
15
PARAMETERS
ADDED FOR
MULTIPLE CPU
16
PRECAUTIONS FOR
USE OF AnS SERIES
MODULE
(2) Auto refresh area setting
The auto refresh area must be set to make data communications using the auto
refresh of the programmable controller CPU or Motion CPU.
To set the auto refresh area, make "Refresh setting" on the <<Multiple CPU setting>>
tab of the C Controller setting utility.
The following provides the details of "Refresh setting".
POINT
Make the same auto refresh area setting to all CPUs in the multiple CPU system.
A parameter error will occur if different settings are made to the CPUs.
(a) "Refresh setting"
The following explains the setting items of "Refresh setting" for auto refresh area
setting.
1) "Change screens"
Four different ranges can be set for "Refresh setting" by "Change screens".
2) "Points"
Set the auto refresh area points of each CPU module in units of 2 points (2
words).
As the auto refresh area points, a total of up to 2048 points (2k words)
*1
can be
set for the 4 ranges (Setting 1 to Setting 4) per CPU, and a total of 8192 points
(8k words)
*2
for all CPUs in the multiple CPU system.
If the CPU module does not use the auto refresh area, set its "Points" to "0".
* 1 In the case of the Basic model QCPU, a total of up to 320 points (320 words) can be set for 4
ranges (Setting 1 to Setting 4) per CPU.
* 2 When CPU No. 1 is the Basic model QCPU, a total of 4416 points (4416 words) can be set for
the all CPUs in the multiple CPU system.
3) "Start", "End"
When "Points" are set, the first address and last address of the auto refresh
area are automatically displayed in "Start" and "End" as hexadecimal offset
values.
Figure 14.11 Auto refresh area setting screen
1)
2)
3)
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