adam card communication problems

[Gak]

Hello

I work in C C Engineers,pune.We have used Adam cards for communication,e.g.4055,4056,4019 etc.

I am simultaneously reading inputs from cards and giving output to them.The data coming from ADAM cards are converted to serial data through ADAM 4520 and is given to PC.

The problem i am facing is if i press one button(Push button),sometimes it shows on software immediatly..but sometimes it does not.

When i went through datasheet,i found that ADAM 4520 is HALF DUPLEX.Can it be a cause of the problem?Because speed of accesing inputs and giving outputs is fast from my softawre.Can you please  help me ?

Also,is there any FULL DUPLEX card which i can use instead of  4520?

P.S: I am accessing and writing data through the cards simultaneously.

Thank you

GAK

[mikeporter]

Frankly, it doesn't sound so much like a communications problem as it does a software structure problem. Can you post some code demonstrating the problem?

Mike...

[Gak]

hi mike

I am attatching communication file now..check if you find any problem.

Let me tell you that m not sending and recieving data from one VI there are 4 parallel vi's .

The communication file is also in while loop so as to constantly update values and there  are 7 adam cards for analog and digital I/O

Waiting for your reply

thank you

GAK

Message Edited by gak on 01-30-2009 09:54 PM

[Gak · Accepted solution]

hi,

reply please.I am waitiong for your reply.

GAK