3.
SPECIFICATIONS
MELSEC-A
(3) The AJ7lC24 completes the
CW
command execution normalty and turns
OFF
its
READY signal (Xn7) after transmitting the response message.
(4)
The AJ71 C24 starts switching the mode, executing the following opera-
tions:
0
AJ71 C24 initial processing
0
Returning the data
in
the special applications area to the default state
(except for the mode switching designation area (address 1 19H)).
0
Clears received data.
0
Mode switching
0
Setting the switched-mode number to the mode setting state storage
area (address 11 8H).
(5)
After completing step
4),
the AJ71C24 turns
ON
its READY signal,
overwriting 02H to the higher bytes in the buffer’s mode switching
designation area.
Witched to
this
mode
number
(de-sigrudd
in
step
2))
-
Mode
switching
mpMed
(6)
Write the set data (for communicating data
in
the switched mode
in
accordance
with
the higher bytes (changed to 02H)) to the AJ71C24
buffer’s special applications area using a sequence program.
However, writing the set data is unnecessary
if
data can be communi-
cated using the default data
in
the special applications area.
(7) Use a sequence program to read the data in the AJ71 C24 buffer’s mode
switching designation area and write
OOH
to the higher bytes.
119H
-1
FROM0
WAND
(1
6M
bgogical
1
OOFFH
product)
119H
-1
TO0
1-1
Sets
the
higher
bytes
to
OOH
(8)
After switching
the
mode, communicate data to provide an interlock
between an external device and the AJ71C24.
(This operation notifies all connected devices that the special applica-
tions area setting has been completed and that data communications
is enabled
in
the switched mode.)
POINT(
The AJ71C24 mode can be switched when the PC CPU is
in
the STOP state.
r
1
c
i
.-
..-
i
P
I
d
3-21
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