Improve RS232 communication PLC

[A.Salcedo]

Hi to all.

First of all thanks a lot for reading this post and being able to help me.

I am communicating labview with a PLC via RS232.

I have an encoder from 0 to 200 ms.

In that time I have acquire 4 boolean shots. From example in 10, 40, 80, 130.

but the communication is too slow and I loose data in a while... because some iterations I just acquire 2 shots, another iteration just one...

How I am doing the communication is with OPC server and taking the encoder adress from PLC.

Is there any way to improve this communication or RS232 is a slow communication?

Thanks a lot.

[GerdW]

Hi A.,

asking for a way to improve a VI without showing this VI is kind of senseless…

General notes:

- Yes, RS232 is rather slow.

- You can set different baud rates for your RS232 connection - as long as both communication partners support them.

[crossrulz]

Lots of information is missing here.  What is the baud rate being used?  What is the serial string protocol?  Where is your code?

[A.Salcedo]

I am using OPC server and the baud rato is 9600.

Maybe I can set more baud rate.

Anyway, is there any way to communicate PLC with Labview via VISA? Maybe like this is faster...

But I can not find information about how can I get data from a PLC variable which is in a specific addres.

Any help?

thanks a lot

[A.Salcedo]

Thanks a lot for replying!!!

See my last post.

Any help will be appreciate it.

Thanks again