D-48
FX Series PLC User's Manual - Data Communication Edition
Computer Link
6 Control Procedures and Setting Methods
6.4 Basic Formats of Dedicated Protocol
6.4.1
Control procedure format 1
The table below shows the control procedure for format 1.
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
*
St
at
io
n
No.
PLC No.
Command
Message wait time
Character
area A
S
um check
code
Character
area B
*
Sum check
code
N
A
K
Er
ro
r
code
N
A
K
A
C
K
Transfer order
St
at
io
n
No.
PLC No.
St
at
io
n
No.
PLC No.
St
at
io
n
No.
PL
C No
.
St
at
ion
No.
PL
C No
.
Transfer order
Computer side
PLC side
E
N
Q
A
C
K
or
*
Character
area C
N
A
K
St
at
io
n
No.
PLC No.
Command
Message wait time
S
um check
code
St
at
io
n
No.
PLC No.
Er
ro
r
code
St
at
io
n
No.
PL
C 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: ......