3.
SPECIFICATIONS
MELSEC-A
POINTS
1
(1)
When power to the PC CPU is turned
ON,
the PC CPU is reset, or the
mode is switched, DCl code is not sent to the external device.
This is the same state as when DCl has already been sent.
(2) DCl/DC3 codes to be sent can be changed.
Section
7.7.2
tells how to change codes.
3.5.4 DClDC3
receive control
This section describes DCl/DC3 receive control.
(1) What is DCl/DC3 receive control?
This function notifies the AJ71C24 whether or not an external device
can receive data using DCl/DC3 codes.
(2)
Control operations
(a) Receiving DC3 code from an external device suspends AJ71C24
data send.
L
n
LL
The received DC3 code is not available to the user.
d
(b)
Receiving DC1 code from an external device resumes AJ71
C24
data
send.
:-el
The received DC1 code is not available to the user.
'A
-#
External
device
E-m
7
d
(c) After DC1 code is received, if another DC1 code is received, that
code will be ignored and will be removed from the received data.
'd
IPOINT~
1
r
When power to the PC CPU is turned
ON,
the PC CPU is reset,
or
the mode
is
switched, even
if
a DC1 code is not transmitted, the state
will
be the
same as when DC1 code has already been sent.
a
:?;
I
I
3-31
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