Auto Refresh Area Setting - Mitsubishi Electric Q12DCCPU-V User Manual

13
COMMUNICATIONS BETWEEN CPU MODULES

(2) Auto refresh area setting

POINT
Data communications with a programmable controller CPU or Motion CPU using auto
refresh require the auto refresh area setting.
Configure the auto refresh area settings in "Communication area setting (refresh
setting)" in <<Multiple CPU settings>> of C Controller setting utility.
The "Communication area setting (refresh setting)" details are described below.
The auto refresh area setting must be identical for all CPUs in the multiple CPU
system.
If any difference is identified in their settings, a parameter error will occur.
(a) "Communication area setting (refresh setting)"
The setting items in "Communication area setting (refresh setting)" are explained
below.
1)
2)
Figure 13.13 Auto refresh area setting screen
1) "Change screens"
Four different ranges can be set for "Communication area setting (refresh
setting)" by "Change screens".
2) "Points"
Set auto refresh area points for each CPU module in units of two points (two
words).
Up to total 2048 points (2K words)
per CPU module, and up to total 8192 points (8K words)
multiple CPU system.
For a CPU module that does not use the auto refresh, enter "0" in the "Points"
field.
* 1 For a Basic model QCPU, up to total 320 points (320 words) can be set for four ranges
(Setting 1 to 4) per CPU module.
* 2 When CPU No.1 is a Basic model QCPU, up to 4416 points (4416 words) can be set for
all CPUs in a multiple CPU system.
3) "Start" and "End"
Setting a "Points" value automatically displays the first and last addresses of
the auto refresh area in the "Start" and "End" fields as hexadecimal offset
values.
13.3 Data Communications Using CPU Shared Memory
3)
*1
can be set for four ranges (Setting 1 to 4)
13.3.2 Data communications using auto refresh
*2
for all CPUs in a
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