Time-Out Time Setting - Mitsubishi FX3U-USB-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Computer Link
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 (FX), FX
2
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 , FX
3G
The setting range is different between the parameter method and the sequence program method.
1) Details of setting range
FX Series
FX (FX), FX
2 2C
FX
0N
FX , FX , FX
1S 1N
FX , FX
2N 2NC
FX , FX , FX
3G 3U
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
M8002
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:
Baud rate (bps)
300
600
1200
2400
4800
9600
19200
38400
, and FX Series, however, the parameter setting method is not applicable.
2C 0N
and FX Series) to D8429 (unit: 10 ms).
3U 3UC
Setting range in parameter
Not applicable
Not applicable
1 to 255 (10 to 2550 ms)
1NC
1 to 255 (10 to 2550 ms)
ch1 1 to 255 (10 to 2550 ms)
3UC
ch2 1 to 3276 (10 to 32760 ms)
MOV K6 D8129
Time to receive one character (ms)
40
20
10
5
2.5
1.25
0.625
0.312
6 Control Procedures and Setting Methods
6.4 Basic Formats of Dedicated Protocol
Setting range in sequence program
(D8129 and D8429)
1 to 3276 (10 to 32760 ms)
1 to 255 (10 to 2550 ms)
1 to 255 (10 to 2550 ms)
1 to 3276 (10 to 32760 ms)
1 to 3276 (10 to 32760 ms)
1 to 3276 (10 to 32760 ms)
→ For details on the program, refer to Section 9.3.
Time-out time setting (minimum set value)
50 ms (5)
30 ms (3)
20 ms (2)
10 ms (1)
10 ms (1)
10 ms (1)
10 ms (1)
10 ms (1)
A
B
C
D
E
F
G
H
I
Apx.
D-49