4. A2CCPU
--------------------
MELSEC·A
I
•
4.4
Parameter
Setting
Range
Parameters are used to allocate user memory area or
the
use range of the
functions.
The parameter data is stored in
the
first 3K bytes in the user memory area.
(1) Default values
Each parameter has a default value as indicated in Table
4.9.
It is not necessary to change parameter data; programs can be run with
default settings.
(2) Changing parameter setting
Parameter settings can be changed in
the
range as indicated in Table
4.9 to meet specific operation needs. A peripheral device should be
used to change the setting.
See the Operation Manual
for
the
peripheral device to be used
for
the
procedure to set the parameter data.
IREMARKl
(1) Conversion of main sequence program capacity, file register capacity and comment
capacity from "steps" and "points" to "bytes" is
described
below.
Item
Setting
Unit.
Number
of
Byte.
Main
sequence
program capacity 1K
steps
2K bytes
File register capacity 1K points 2K bytes
Comment
capacity 64 points 1K byte
(2) When comment capacity is set with a peripheral device, 1K byte area is automatically taken
in
addition
to
the
setting;
the
comment capacity
displayed
is, therefore, 1K byte larger than
the set
value
.
Table
4.9
Parameter
Setting
Range
~t.
Default
Peripheral
Device.
Value
Setting Range Ref.r to
Item PU
GPP HGP
PHP
Main sequence program capacity 6K steps
1 to 8K steps
0
0 0
0
(1K step increments)
File register capacity
None
1 to 4K points
0 0 0 0
(1K point increments)
Comment
capacity None
o to
4032
points *1
-
0 0
0
4.4.1
(64 point increments)
Memory
capacity 0/8 to 12K bytes
Status latch
Data
memory
None
NolYes
-
0 0
0
File register Nerves (2 to BK bytes)
4-49
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