Professional OPC
Development Tools

logos

lupa

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.

Reading, Writing, Subscriptions, Property Access 286 topics

Subject Replies / Views Last Post
WriteMultipleItemValues gets stuck
Category: Reading, Writing, Subscriptions, Property Access
Topic started 07 May 2025 09:18, by KrisSik
Last Post 14 May 2025 05:32
by KrisSik
Replies:7
Views:75
Last Post by KrisSik
14 May 2025 05:32
Issue in reading tags after a PLC reboot
Category: Reading, Writing, Subscriptions, Property Access
Topic started 05 Mar 2025 07:27, by Gardoni
Last Post 10 Mar 2025 10:32
by support
Replies:9
Views:200
Last Post by support
10 Mar 2025 10:32
Design Question / Rely on automatic subscriptions or subscribe manually?
Category: Reading, Writing, Subscriptions, Property Access
Topic started 14 Oct 2020 20:33, by tblong
Last Post 13 Feb 2025 06:15
by support
Replies:10
Views:3064
Last Post by support
13 Feb 2025 06:15
OPC DA Optimizer for OPC XML. Request Chunking
Category: Reading, Writing, Subscriptions, Property Access
Topic started 23 Oct 2024 09:43, by Andriy
Last Post 01 Nov 2024 11:27
by support
Replies:8
Views:1231
Last Post by support
01 Nov 2024 11:27
Write to Tag demo
Category: Reading, Writing, Subscriptions, Property Access
Topic started 13 May 2024 20:58, by tlaford
Last Post 09 Oct 2024 18:44
by support
Replies:3
Views:529
Last Post by support
09 Oct 2024 18:44
Powershell library problem with new version of dll?
Category: Reading, Writing, Subscriptions, Property Access
Topic started 22 Jul 2024 17:47, by makodse
Last Post 22 Jul 2024 19:51
by makodse
Replies:5
Views:656
Last Post by makodse
22 Jul 2024 19:51
Reading already subscribed item causes troubles with State
Category: Reading, Writing, Subscriptions, Property Access
Topic started 03 Jul 2024 07:09, by KrisSik
Last Post 04 Jul 2024 17:49
by KrisSik
Replies:7
Views:428
Last Post by KrisSik
04 Jul 2024 17:49
Read an Array of structure
Category: Reading, Writing, Subscriptions, Property Access
Topic started 22 May 2024 14:36, by Twoaster
Last Post 04 Jun 2024 19:44
by Twoaster
Replies:17
Views:1480
Last Post by Twoaster
04 Jun 2024 19:44
Unable to read Array with KEPServer EX 6 and AB Logix
Category: Reading, Writing, Subscriptions, Property Access
Topic started 22 Mar 2024 13:18, by glwalsh
Last Post 31 Mar 2024 10:47
by MaxDeVos
Replies:6
Views:1437
Last Post by MaxDeVos
31 Mar 2024 10:47
Writing value and timestamp to OPC DA 2.05a
Category: Reading, Writing, Subscriptions, Property Access
Topic started 27 Feb 2024 16:06, by ScottEwine
Last Post 27 Feb 2024 16:40
by support
Replies:1
Views:576
Last Post by support
27 Feb 2024 16:40
Can I read a value at a specified date/time?
Category: Reading, Writing, Subscriptions, Property Access
Topic started 14 Feb 2024 16:12, by ScottEwine
Last Post 14 Feb 2024 17:26
by support
Replies:3
Views:510
Last Post by support
14 Feb 2024 17:26
Unable to read/write an array using UAIndexRangeList.OneDimension
Category: Reading, Writing, Subscriptions, Property Access
Topic started 01 Dec 2023 16:29, by Scaglioni
Last Post 05 Dec 2023 15:31
by support
Replies:5
Views:889
Last Post by support
05 Dec 2023 15:31
Addressing single index in array node
Category: Reading, Writing, Subscriptions, Property Access
Topic started 04 Dec 2023 10:51, by alenjursic1997
Last Post 04 Dec 2023 11:01
by support
Replies:1
Views:508
Last Post by support
04 Dec 2023 11:01
It seems writing a DateTime with with EasyDAClient.WriteItem() is not supported
Category: Reading, Writing, Subscriptions, Property Access
Topic started 28 Nov 2023 13:13, by ScottEwine
Last Post 28 Nov 2023 16:32
by ScottEwine
Replies:2
Views:477
Last Post by ScottEwine
28 Nov 2023 16:32
Error writing Complex data in OPC UA with 5.71
Category: Reading, Writing, Subscriptions, Property Access
Topic started 07 Sep 2023 09:57, by Gardoni
Last Post 07 Sep 2023 10:26
by support
Replies:1
Views:821
Last Post by support
07 Sep 2023 10:26
I want to write an array in c#.
Category: Reading, Writing, Subscriptions, Property Access
Topic started 03 Aug 2023 01:35, by Shin Hyun Jin
Last Post 03 Aug 2023 11:24
by support
Replies:1
Views:569
Last Post by support
03 Aug 2023 11:24
ReadMultipleItems - Failure: OPC NET API error - result ID: E_NETWORK_ERROR;
Category: Reading, Writing, Subscriptions, Property Access
Topic started 18 Jan 2023 06:48, by yong
Last Post 22 Jun 2023 07:01
by support
Replies:10
Views:3523
Last Post by support
22 Jun 2023 07:01
How to troubleshoot Timeout Exception?
Category: Reading, Writing, Subscriptions, Property Access
Topic started 10 Jan 2023 16:35, by aris
Last Post 10 Jan 2023 16:47
by support
Replies:1
Views:1108
Last Post by support
10 Jan 2023 16:47
Error when calling EasyDAClient1.ReadItem() - 'Value cannot be null.
Category: Reading, Writing, Subscriptions, Property Access
Topic started 07 Jan 2023 07:47, by micham
Last Post 08 Jan 2023 07:20
by micham
Replies:2
Views:644
Last Post by micham
08 Jan 2023 07:20
UA Measurement system option?
Category: Reading, Writing, Subscriptions, Property Access
Topic started 06 Jan 2023 17:14, by janderscu
Last Post 07 Jan 2023 09:48
by support
Replies:1
Views:648
Last Post by support
07 Jan 2023 09:48
Time to create page: 0.077 seconds