Advertisement
3 .
LINKING TO THE A2CCPU
MELSEC-A
3uffer addresses
" 0 "
'2"
' 4 "
' I "
If an attempt is made to store FROMTTO instruction information which is
larger than the number
of vacancies in the request-to-communicate
registration areas, that attempt will be ignored.
To
prevent this, it is
necessary to provide a condition to allow confirmation that the vacancy
in the request-to-communicate registration areas
is larger than the
FROMTTO instruction information. The programming example shown
below describes the case when the
FROM/TO instruction is executed
after confirming such a vacancy in the request-to-communicate registra-
tion areas.
i
Initial setting program for the A64RDC
i
(
Channel designation (buffer address
0)
:
Averaging designation (buffer address
1)
:
!
Channel
1
averaging time (buffer address 2)
Channel 3 averaging count
I
(buffer address
4)
I
\
I
Channels 1 and
3
1
i
1000
msec
10
times
Initial setting Conversion
instruction
READY
H
I
Confirmation of a vacancy in the request-
to-communicate registration areas
Conversion-enabled/
disabled designation
Channel 1 averaging
time designation
Channel
3
averaging
count designation
- 1
PRC
I
M1
1
YO
3-22
Advertisement
