Professional OPC
Development Tools

logos

Online Forums

Technical support is provided through Support Forums below. Anybody can view them; you need to Register/Login to our site (see links in upper right corner) in order to Post questions. You do not have to be a licensed user of our product.

Please read Rules for forum posts before reporting your issue or asking a question. OPC Labs team is actively monitoring the forums, and replies as soon as possible. Various technical information can also be found in our Knowledge Base. For your convenience, we have also assembled a Frequently Asked Questions page.

Do not use the Contact page for technical issues.

ReadMultipleItems returns old values (The same data will be collected.)

More
22 Dec 2022 13:49 #11380 by support
Your code is incorrect for what you want to achieve.

Modify it according to the following, i.e. specify reading from the device, as I have told you earlier :

- opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%2...ems%20from%20the%20device.html

- opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%2...m%20OPC%20Classic%20Items.html

Regards
The following user(s) said Thank You: yong

Please Log in or Create an account to join the conversation.

More
22 Dec 2022 06:54 #11374 by yong
Hello

Source code is simple.
Capture the source code and deliver it.


Regards
Attachments:

Please Log in or Create an account to join the conversation.

More
22 Dec 2022 06:42 #11373 by support
Hello.

I am not sure from your answers that you are doing the recommended way.

Please post here the piece of your code that prepares arguments for ReadMultipleItems, and calls the method.

Regards

Please Log in or Create an account to join the conversation.

More
21 Dec 2022 23:13 #11371 by yong
The device has completed read settings.

Please Log in or Create an account to join the conversation.

More
21 Dec 2022 08:58 #11369 by support
You are not answering my question. It has nothing to do with subscription.

Have you changed your program to use read from device, as I described in one of the previous posts?

Please Log in or Create an account to join the conversation.

More
21 Dec 2022 08:57 #11367 by yong
Currently, it is a polling, not a subscription.

Please Log in or Create an account to join the conversation.

More
21 Dec 2022 08:49 #11366 by support
Have you changed your program to use read from device, as I described in one of the previous posts?

Please Log in or Create an account to join the conversation.

More
21 Dec 2022 08:47 #11365 by yong
Use the ReadMultipleItems function to make a request to the server and receive data.

Regards

Please Log in or Create an account to join the conversation.

More
21 Dec 2022 07:18 #11363 by support
Thank you.

Have you changed your program to use read from device, as I described in one of the previous posts?

Regards

Please Log in or Create an account to join the conversation.

More
21 Dec 2022 00:30 #11361 by yong
I'm sorry. I'll tell you again.
It's when I applied the dcerpc filter in Wireshark.


If normal, the packet should come request, response normally, but there is no packet requset, response.

Regards
Attachments:

Please Log in or Create an account to join the conversation.

Moderators: support
Time to create page: 0.092 seconds