APPENDICES
MELSEC-A
APPENDIX
9.
Example
of
a
Sequence Program for
Data
Communications in
the
Bidirectional Mode
The following figure gives the example of a sequence program for transmit-
ting data received from the computer and the data
of
the data register (D100)
of
a PC CPU to the computer
in
the bidirectional mode.
PC
CPU
An1
c24
'AnlC24=" Computer
Wived
dutn
read-
-
-
---
ACK
Send
dub
write
123"42C17JA"
Send resutt mad
ACK
---
(1) Settings to the buffer memory
The figure below describes settings at the special-applications area
of
AJ71 C24 buffer memory.
Appendix 11 gives details of the memory setting record form.
c
L
c
L
c
r
c
L
APP
-
21
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