c
3.
SPECIFICATIONS
.
..I.
-
I/I
,.,.;
*
MELSEC-A
c
L
-..
*
3.4.3
Procedure
for
swttchlng
the
mode
from
8
PC
CPU
The mode is switched by using a
FROM/TO
instruction.
L
Before and after switching the mode, provide an interlock between sequence
program operations and the mode switching operation (see Section 3.4.1 (1)-3).
c
The mode switching procedure is shown below.
1------1
c
2Ezz2%w&
This section describes steps
(1)
to
(8)
shown
in
the above figure.
Before switching the mode, communicate the data to provide an interlock
between the external device and the
AJ71
C24
(sequence program).
(This is because the mode switching conditions must be set for all
connected devices.)
By using the
CW
command, write the next mode number and the mode
switching request from the external device to the mode switching desig-
nation area (address 11
9H).
..-
c
The nex?
mode
number io
be
witched
The
.une
number
M
Eh.
mod.
setting
witch
number
shown
in
section
4.3.1 is
specified.
Example:
L'
'
\
c
b..
f
'-
F
I
Requesi
to
switch
the
mode
(be
Ssction
7.6.2)
3-22
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