D-49
FX Series PLC User's Manual - Data Communication Edition
Computer Link
6 Control Procedures and Setting Methods
6.4 Basic Formats of Dedicated Protocol
A
Comm
on I
te
ms
B
N:
N N
etwo
rk
C
Paral
le
l Li
nk
D
Com
puter Li
nk
E
In
verter
C
omm
uni
cation
F
N
on-Proto
col
C
ommunicati
on
(R
S/RS
2 Instru
ction
)
G
No
n-
Protoc
ol
Co
mmuni
ca
tion
(FX
2N
-2
32IF)
H
Programm
ing
Comm
uni
cation
I
Re
mo
te
Ma
intenance
Apx.A
D
isco
nti
nued
models
6.4.2
Control procedure format 4
The table below shows the control procedure for format 4.
Description
Control procedure (protocol)
When
computer
reads data
from PLC
When
computer
writes data to
PLC
Remarks
1) The sum check code is added only when "sum check code provided" is selected.
The sum check code is not added when "sum check code not provided" is selected.
2) When "sum check code provided" is selected, the sum check is executed only to the character
areas marked with "*" in the figure above.
3) The contents of "Character area A", "Character area B" and "Character area C" vary depending
on the contents of transfer, but do not vary depending on the control procedure format.
For details on character contents, refer to "7. Commands".
Computer side
PLC side
E
N
Q
S
T
X
E
T
X
or
or
*
*
N
A
K
N
A
K
A
C
K
L
F
C
R
L
F
C
R
L
F
C
R
L
F
C
R
L
F
C
R
Transfer order
St
at
io
n
No.
PLC No.
Command
Message wait time
Character
area A
S
um check
code
Character
area B
Sum check
code
St
at
io
n
No.
PL
C No
.
Er
ro
r
code
St
at
io
n
No.
PL
C No
.
St
ation No.
PLC No.
St
at
io
n
No.
PLC No.
Computer side
PLC side
E
N
Q
A
C
K
or
*
N
A
K
L
F
C
R
L
F
C
R
L
F
C
R
Transfer order
St
at
io
n
No.
PLC No.
Command
Message wait time
Character
area C
S
um check
code
Er
ro
r
code
St
at
io
n
No.
PL
C No
.
St
at
io
n
No.
PLC No.
Summary of Contents for FX-485ADP
Page 2: ......
Page 120: ...B 2 FX Series PLC User s Manual Data Communication Edition N N Network ...
Page 188: ...C 2 FX Series PLC User s Manual Data Communication Edition Parallel Link ...
Page 244: ...D 2 FX Series PLC User s Manual Data Communication Edition Computer Link ...
Page 344: ...E 2 FX Series PLC User s Manual Data Communication Edition Inverter Communication ...
Page 700: ...H 2 FX Series PLC User s Manual Data Communication Edition Programming Communication ...
Page 752: ...I 2 FX Series PLC User s Manual Data Communication Edition Remote Maintenance ...
Page 817: ......