Advantech ADAM-4577 Manuel d'utilisateur télécharger pdf (Page 48)

38 ADAM-4577 User’s Manual

2. Inter Frame Break

ADAM-4577 provides one smart way to reduce inefficient waiting

time.Through Inter Frame Break,ADAM-4577 transmits data more

fficiently.

Inter Frame Break is a good control machine, ADAM-4577 will distin-

guish whether it transmits back data to host PC by the function. As to

set Inter Frame Break 30 ms, ADAM-4577 won't wait response timeout

1000ms over to transmit data As long as the idle time is longer than 30

ms, ADAM-4577 starts to transmit back data to host PC.

Without setting Inter Frame Break, If the device have transmitted out

the data before response timeout is over,ADAM-4577 has to wait

response timeout over to transmit back data to host PC.The transmis-

sion way is very inefficient.For solving the problem,you can set Inter

Frame Break value.

ADAM-4577 will cause efficient network environment with Inter Frame

Break function ADAM-4577 utility default is zero,it means the time of

ADAM-4577 transmits data back to host PC only depends on Re-

sponse Timeout.

As follows ,we will compare the data time from two case. One is we

don’t set any Inter Frame Break, another is setting Inter Frame Break.

Through the comparison, you can see the effectiveness of setting

Inter Frame Break.

Case1 :

Assume the transmitted data spends 600 ms

As Setting:

Response timeout = 1000 ms

Inter Frame Break = 0 ms

Figure 3-9 Case1 data time diagram

Host PC

Start to transmit

Time over

(Response timeout)

Real data time

Wasting time

1000 ms

400 ms600 ms

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Advantech ADAM-4577 Manuel d'utilisateur Page 48