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2
SERIAL COMMUNICATION MODULE REPLACEMENT
(2) Program example of L series serial communication module
CPU module
Send
enable
M10
flag
OUTPUT
M0
X3
X4
INPUT
M20
2
- 26
LJ71C24
Buffer memory
Address
400
H
Data writing
Send request
Send completion
Read request
Buffer memory
Address
Data reading
600
H
Read completion
Data sending
Data receiving
Personal
computer
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