D-54
FX Series PLC User's Manual - Data Communication Edition
Computer Link
6 Control Procedures and Setting Methods
6.5 Transfer Sequence Time Chart and Communication Time
6.5
Transfer Sequence Time Chart and Communication Time
This section explains the communication time chart between the computer and the PLC.
As shown in the figures below, communication between the computer and the PLC is always executed after
"END". The scan time is extended by the communication time.
6.5.1
When computer reads data from PLC
6.5.2
When computer writes data to PLC
PLC
Interval times
FX
3U
, FX
3UC
300
s
FX
2N
, FX
2NC
, FX
3S
, FX
3G
,
FX
3GC
100
s
FX
2
(FX), FX
2C
, FX
0N
, FX
1S
, FX
1N
, FX
1NC
two scan times
E
N
Q
Computer
Interface
PLC
A
C
K
S
T
X
Waiting time
(TW)
T
3
T
4
T
5
It should be the interval times in the following
table or more.
Reading
processing
This time is "0" when the message waiting time is
not set or when the waiting time is shorter than the
communication time with the CPU.
T
0
T
1
T
2
Sequence
program
END
Step 0
END
Step 0
END
Step 0
END
The PLC watches the time elapse. When it reaches the
transmission time, the PLC starts the transmission. If not,
the PLC evaluate the time elapse in the END process of
the next step.
E
N
Q
Computer
Interface
PLC
Waiting time
(TW)
T
3
This time is "0" when the message waiting time is
not set or when the waiting time is shorter than the
communication time with the CPU.
T
0
T
1
T
2
Sequence
program
END
Step 0
END
Step 0
END
Step 0
END
Data is
written.
W
riting
processing
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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