4
6.
HOW TO USE EACH FUNCTION
MELSEC-A
[Explanation]
,--..I
(1)
Operation
of
"1:PARAM. ALL CLEAR"
sets the parameters in the
A8PUE
to
default.
(2)
If
writing
to
ACPU
has not been executed and the mode is transferred
to
the
OTHERS
mode after operating
"1
:
PARAM. ALL CLEAR",
$he param-
eters
in
the
A8PUE
return
to
the setting before operating
"1
:
PARAM. ALL
CLEAR".
(3)
If
the key word is registered, parameter all clear cannot be executed.
I
REMARK
I
The parameter in the A8PUE
is
set to a set value read
from
ACPU when starting up the A8PUE.
POINTS
1
When executing parameter all clear,
if
the key word registered
in
the
ACPU
is unknown, see the
"PC
memory all clear" operation shown in
Section
5.1.3.
And then, clear (delete) the unknown registered key
word.
If
"PC
memory all clear" is executed, all other user data (such as
sequence programs) will also be cleared.
Section
6.8.2
gives details about when (a) the key word registered in
an
ACPU
is changed, or (b) a new key word is registered.
6-59
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