Mitsubishi Programmable Controllers FX-232ADP Manual de usuario descargar pdf (Pagina 23)

FX communication

Specifications 2

2-3

2.2.3 Computer link

Calculations to determine the approximate time until communication is complete.

1 ) Programmable controller

→

Computer

Communication time = Total number of characters based on dedicated protocol

Time to send or receive one character (ms)

+ Programmable controller’s maximum scan time (ms)

+ Message wait (ms)

2 ) Computer

→

Programmable controller

Communication time = Number of total characters based on dedicated protocol

Time to send or receive one character (ms)

+ Programmable controller’s maximum scan time (ms)

+ Message wait (ms)

Note:

*1 Please count the number of characters with reference section 7.4.1 and 7.4.2 and chapter 8.

*2 Please refer to the following expression for time calculation.

Time to send or receive one character = 1/baud rate

number of bits in character

(start bit(1) + Data length(7 or 8) + Parity bit(0 or 1) + Stop bit(1 or 2))

Example

When 1 character = 10 bits (Data length = 7, Parity bit = 1, stop bit = 1 start bit = 1),

the time is as follows.

Note;

Please refer to following table for the relation between reading word points and communication

time.

“Message time = 0ms, Maximum scan time = 20ms, Dedicated protocol format = format 1,

Command = WR, Baud rate = 9,600 or 19,200 bps”

Baud rate (bps) Time to send or receive one character (ms)

300 33.34

600 16.67

1200 8.34

2400 4.17

4800 2.08

9600 1.04

19200 0.52

Reading word points

Baud rate (bps)

9,600 19,200

10 0.3 s 0.2 s

32 0.4 s 0.3 s

64 0.5 s 0.4 s

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 161 162

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Mitsubishi Programmable Controllers FX-232ADP Manual de usuario Pagina 23

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