What is the purpose of open/close connection data socket?

[yehchia]

Hello everyone,

I am writing and reading values in OPC Server through data socket. What is the purpose of open/close connection data socket when writing /reading a value?  Without the open/close connection element, it still work correctly. I am writing values in the server thru event stucture.I do not need any buffered reading or writing. What will happen if I didnt not use the open/close connection? Maybe it may cause some problems in my program which i didnt realise? 

And I have attached an example of my program. Thanks

Yehchia

[Christian Mergl]

Hi Yehchia,

That's right, if you read/write a single value it makes no difference.

But when reading/writing thousands of them it's better to open the connection before and close it afterwords.

Christian

[yehchia]

Hello,

I am writing and reading multiple of signals. And I am using the open /close function. I would like to know what will happen if i didnt have it? 

Thank You

YehChia

[Christian Mergl]

Hi YehChia,

I was talking about something like that:

1. Not good. since with every iteration the DS connection needs to be opened and closed.

2. Good. Since you open the connection only once then do the reads and close it afterwords.

Christian

[yehchia]

I see.. Thanks a lot for your information