D-45
FX Series PLC User's Manual - Data Communication Edition
Computer Link
6 Control Procedures and Setting Methods
6.1 Data Flow by Link
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. Control Procedures and Setting Methods
6.1
Data Flow by Link
The figures below show images of data flow achieved when data is read from or written to a PLC CPU and
the status is controlled.
In the case of communication in accordance with RS-232C, ignore "485PC-IF" and regard "485ADP" as
"232ADP".
1. When the computer reads data from the PLC
2. When the computer writes data to the PLC
3. When the PLC sends data to the computer (on-demand function)
*1.
The OS (standing for "Operating System") indicates the software used to efficiently operate the
resources including the CPUs, memories, terminals, files, and networks using user programs, etc.
Computer
OS
*1
Sequence
program
RS-232C
485PC-IF
RS-485
Device
memory, etc.
485ADP
PLC CPU
[2] Command
[9] Various data
[12] Response
Device
memory
information
(read)
PLC CPU
information
(read)
[1
] R
eq
ue
st
[10] [11]
Interface for
signal
conversion
[3]
[8]
[13]
[4]
[7]
[14]
[6] Data
[5] Read
OS
*1
Computer
Sequence
program
RS-232C
485PC-IF
RS-485
485ADP
PLC CPU
[2] Command,
data, etc.
[8] Response
Device
memory
information
(written)
PLC CPU
information
(written)
[3]
[4]
[5] Write
[7]
[6]
Device
memory, etc.
[1
] R
eq
ue
st
OS
*1
OS
*1
Computer
OS
*1
Sequence
program
RS-232C
485PC-IF
RS-485
OS
*1
485ADP
PLC CPU
[6] Data
[2]
Read
[5]
[4] Data
[7]
Write
On-demand
data
[3] Data
[1] Sending
request
+
Data writing
Device
memory, etc.
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 ...
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