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Can I use endpoint connection? - by: Pala
Hì I have seen that is possible connect OPC UA endpoint is possible use this mode to connect by Php script? if yes can I have documentation about this
View ArticleError using ReadValueList - by: info@software2000.it
good evening, I'm encountering an error using ReadValueList, in the attached screenshot the exact error that is returned to me by the variable good evening, I'm encountering an error using...
View ArticleHow can I subscribe to a 2D Array OPC DA-Item? - by: mut9bu
Hello I am subscribing to a multidimension (2D) Array OPC DA-Item of a remote OPC DA Server (CNC Machine) The rows of the item show the active Error messages on the CNC machine line by line (each row...
View ArticleLarge amount of reconnections in a short time - by: dvrstrae
Hi,I am using QuickOPC 2018.3, in particular the OPC-UA client functionality through COM from Python, to connect to a Siemens S7 OPC-UA server (using username/password authentication). See below for...
View ArticleMatch Pattern for Embedding a License - by: nknox
Hello, I am just reaching out to note some behavior that a customer brought forward with the match pattern feature implemented in v2023.1. When using the recommended pattern, "*.Key-*.*", embedded...
View ArticleSupport Microsoft Access Program - by: kuchlerm
Dear Opclabs Support Our license order number is: 199932. A copy of invoice you will find in the attachment. We have developed an opc client application with ms access version (Micosoft...
View ArticleThe client appears to have stopped running - by: xpycy001
Hi,support : I have encountered the following problem, please provide some suggestions for handling it [A] Problem description 1 The OPC UA client appears to have stopped working, the application CPU...
View ArticleOPC NET API error - result ID: E_NETWORK_ERROR - by: justin@regionalit.com.au
HI Guys, I hope you are doing well. We are encountering an issue while writing and reading value from the OPC server. We are using .NET 6 platform to integrate with the OPC server. We can browse...
View ArticleWhen I interrupt subscription to OPC DA server item(s), I cannot...
Hello I have an interesting finding regarding subscription to OPC DA server item(s). With my code below: (Net Framework 4.7.2 Console app) 1) When I subscribe to a dynamic changing item let say for 10...
View ArticleCan I get info reg. the subscription cycle while subscribing to OPC DA items?...
Hello I am subscribing to multiple items with code below. When I use the item values just for showing on my apps screen there is no much problem. But in some cases I need to draw some curve with the...
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Is it possible to programmatically get all OPC Group names including their...
Hi, Is it possible to programmatically get all OPC Group names including their path? See the attached screen capture. Using this example, can I get all group names such as: bnewgglp01_tunnel...
View ArticleCan I read a value at a specified date/time? - by: ScottEwine
Good Morning, I would like to read the value if an item at a specified date/time to load historical data into another system, something like this, where I specify an additional parameter: dAVtq =...
View ArticleRe: Guidance on polling rates, number of points - by: stevedh
Guidance on polling rates, number of points
View ArticleOPC COM communicaton [Python, win32com] - by: support
Hi, let me introduce myself. My name is M., and I'm working with the trial of EasyOPC. Actually I'm interested in making a COM interface with python languaje, using win32com module. I'm trying to make...
View ArticleQuickOPC with TestStand (National Instruments) - by: Icebaer
Hi, at the moment I test the EasyUAClient with TestStand 2012 from National Instruments. TestStand has an ActiveX/COM or .NET Adapter (screenshoot at the attachment). I have made a short sequence...
View ArticleSetting DataSource when reading values through Python - by: jihaekor
Hello, I was looking for a way to set the datasource to 'device' using a Python implementation of QuickOPC, but I could not find a good way of getting this to work even after searching through the...
View ArticleGetting 'Read not completed' and 'Write not completed' errors while trying to...
Hi, I'm trying to read and write to a Softing S7 server running on localhost, but getting errors. I'm using OpcLabs.EasyOpc.DataAccess.EasyDAClient via the win32com client for Python. I've installed on...
View ArticlePotential Memory Leak? (Python) - by: support
From: C. Sent: Monday, November 13, 2017 1:20 PM To: Z. Subject: Potential Memory Leak? Hi Z., [..] using QuickOPC in Python and [..] may have found a small memory leak that I wanted to get your input...
View ArticlePython examples - by: filin
Hello! I have a small question. How I can register callback for subscribtion (i mean smth like ItemChanged)? Do you have any examples for it?
View ArticleQuickOPC in Python - by: hkhodabandehlou
Hello, I am trying to write a client code in Python using QuickOPC and have few questions: 1)Is there any way to read and write groups instead of reading and writing item by item? 2)Right now I am...
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