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10. COMMUNICATIONS IN THE BIDIRECTIONAL MODE
MELSEC-A
10.4
Bidirectional Control Procedure Basics
(1) Transmitting data from an AlSJ71C24 to a computer
Computer
AlSJ71 C24
Area
A
(a) Area A: Data send from an AlSJ71 C24 to a computer
(b)
Area 6: Data send from a computer to an AlSJ71C24
0
(c) Write a program so that data is transmitted from left to right.
(Example: For area A, data is transmitted from ENQ to right)
(2) Transmitting data from a computer to an AlSJ71C24
I P I
Computer
(a) Area A: Data send from a computer to an AlSJ71C24
(b)
Area B: Data send from an AlSJ71C24 to a computer
(c) Write a program so that the data is transmitted from left to right.
(Example: For area A, data is transmitted from ENQ to right)
E :
N
:
AreaA
Q
,
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