D-53
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
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F
N
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C
ommunicati
on
(R
S/RS
2 Instru
ction
)
G
No
n-
Protoc
ol
Co
mmuni
ca
tion
(FX
2N
-2
32IF)
H
Programm
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Comm
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I
Re
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Ma
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models
6.4.4
Time-out time setting
When the receiving of data from the computer is interrupted and is not restarted within the preset time (time-
out time setting), the PLC regards the situation as a timeout error and initializes the transfer sequence.
1. Time-out time setting range
The time-out time setting can be set using parameters or sequence program.
In the FX
2
(FX), FX
2C
and FX
0N
Series, however, the parameter setting method is not applicable.
When setting the time-out time setting in a sequence program, write a value for ch1 to D8129, and a value for
ch2 (in the FX
3G
, FX
3GC
, FX
3U
and FX
3UC
Series) to D8429 (unit: 10 ms).
However, D8429 (ch2) cannot be set in sequence programs.
The setting range is different between the parameter method and the sequence program method.
1) Details of setting range
When the set value is "0", it is handled as "100 ms".
2) Example of setting program
When setting the time-out time setting to 60 ms
For details on the program, refer to Section 9.3.
2. Caution on programming
The time-out time setting is not updated until the next character data is received. Set a time to receive a
character according to the transmission speed (baud rate).
For one character (12-bit), the minimum set value of the time-out time setting is as shown below:
FX Series
Setting range in parameter
Setting range in sequence program
(D8129 (ch1) and D8429 (ch2))
FX
2
(FX), FX
2C
Not applicable
1 to 3276 (10 to 32760 ms)
FX
0N
Not applicable
1 to 255 (10 to 2550 ms)
FX
1S
, FX
1N
, FX
1NC
1 to 255 (10 to 2550 ms)
1 to 255 (10 to 2550 ms)
FX
2N
, FX
2NC
, FX
3S
1 to 255 (10 to 2550 ms)
1 to 3276 (10 to 32760 ms)
FX
3G
, FX
3GC
,
FX
3U
,
FX
3UC
ch1
1 to 255 (10 to 2550 ms)
1 to 3276 (10 to 32760 ms)
ch2
1 to 3276 (10 to 32760 ms)
Not applicable
Baud rate (bps)
Time to receive one character (ms)
Time-out time setting (minimum set value)
300
40
50 ms (5)
600
20
30 ms (3)
1200
10
20 ms (2)
2400
5
10 ms (1)
4800
2.5
10 ms (1)
9600
1.25
10 ms (1)
19200
0.625
10 ms (1)
38400
0.312
10 ms (1)
M8002
MOV K6 D8129
Initial pulse
Summary of Contents for FX-485ADP
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Page 344: ...E 2 FX Series PLC User s Manual Data Communication Edition Inverter Communication ...
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