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FX Series PLC User's Manual - Data Communication Edition
Computer Link
6.4.2
Control procedure format 4
The table below shows the control procedure for format 4.
Description
When
Computer side
computer
reads data
PLC side
from PLC
Computer side
When
PLC side
computer
writes data to
PLC
1) The sum check code is added only when "sum check code provided" is selected.
2) When "sum check code provided" is selected, the sum check is executed only to the character
Remarks
3) The contents of "Character area A", "Character area B" and "Character area C" vary depending
Transfer order
*
E
N
Q
*
E
N
Q
Transfer order
The sum check code is not added when "sum check code not provided" is selected.
areas marked with "*" in the figure above.
on the contents of transfer, but do not vary depending on the control procedure format.
For details on character contents, refer to "7. Commands".
6 Control Procedures and Setting Methods
Control procedure (protocol)
C
L
Character
area A
R
F
S
T
X
or
N
A
K
C
L
Character
area C
R
F
A
C
K
or
N
A
K
6.4 Basic Formats of Dedicated Protocol
N
A
K
or
A
C
K
E
C
L
Character
T
area B
R
F
X
*
C
L
R
F
C
L
R
F
C
L
R
F
D-49
A
B
C
L
R
F
C
L
C
R
F
D
E
F
G
H
I
Apx.A
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