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 287 topics

Subject Replies / Views Last Post
Change shared parameters on the EasyDAClient causes exception
Category: Reading, Writing, Subscriptions, Property Access
Topic started 07 Feb 2020 11:36, by Andriy
Last Post 08 Feb 2020 10:04
by support
Replies:1
Views:1043
Last Post by support
08 Feb 2020 10:04
Slowly reading or timeout exception
Category: Reading, Writing, Subscriptions, Property Access
Topic started 19 Dec 2019 06:35, by denis
Last Post 14 Jan 2020 20:08
by support
Replies:9
Views:2158
Last Post by support
14 Jan 2020 20:08
Slowly reading or timeout exception
Category: Reading, Writing, Subscriptions, Property Access
Topic started 18 Dec 2019 13:09, by denis
Last Post 18 Dec 2019 13:09
by denis
Replies:0
Views:1809
Last Post by denis
18 Dec 2019 13:09
DA-XML: SubscribeItem with percentDeadBand causes COM exception
Category: Reading, Writing, Subscriptions, Property Access
Topic started 17 Dec 2019 21:13, by goosvanbeek
Last Post 18 Dec 2019 08:33
by support
Replies:1
Views:1096
Last Post by support
18 Dec 2019 08:33
OPC XML-DA. There are many sockets open in subscription mode
Category: Reading, Writing, Subscriptions, Property Access
Topic started 03 Oct 2019 10:30, by Andriy
Last Post 22 Nov 2019 16:16
by support
Replies:10
Views:3588
Last Post by support
22 Nov 2019 16:16
Siemens S7-1500F : Schreiben von Tags
Category: Reading, Writing, Subscriptions, Property Access
Topic started 20 Nov 2019 08:21, by tmouslih
Last Post 21 Nov 2019 12:55
by support
Replies:7
Views:1880
Last Post by support
21 Nov 2019 12:55
I can write to an OPC server but not read
Category: Reading, Writing, Subscriptions, Property Access
Topic started 18 Sep 2019 23:51, by mikeboiko
Last Post 10 Nov 2019 12:17
by support
Replies:24
Views:5952
Last Post by support
10 Nov 2019 12:17
OPC XML-DA. Error: The item value does not specify a timestamp.
Category: Reading, Writing, Subscriptions, Property Access
Topic started 30 Sep 2019 11:42, by Andriy
Last Post 15 Oct 2019 09:12
by support
Replies:7
Views:1506
Last Post by support
15 Oct 2019 09:12
OPC XML-DA. OPC Server status check can not be disabled
Category: Reading, Writing, Subscriptions, Property Access
Topic started 03 Oct 2019 12:05, by Andriy
Last Post 15 Oct 2019 09:11
by support
Replies:2
Views:1342
Last Post by support
15 Oct 2019 09:11
Operation failure with error code -2147352566 (0X8002000A) occured.
Category: Reading, Writing, Subscriptions, Property Access
Topic started 03 Oct 2019 14:23, by Nabro
Last Post 03 Oct 2019 14:29
by support
Replies:1
Views:1799
Last Post by support
03 Oct 2019 14:29
Slow Update To Listview (Large Amount Of Tags)
Category: Reading, Writing, Subscriptions, Property Access
Topic started 30 Aug 2019 14:44, by neilcooley
Last Post 30 Sep 2019 17:20
by neilcooley
Replies:12
Views:3098
Last Post by neilcooley
30 Sep 2019 17:20
How to get the status of TEeasyUAClient.WriteValue
Category: Reading, Writing, Subscriptions, Property Access
Topic started 26 Sep 2019 11:57, by Moien
Last Post 26 Sep 2019 12:30
by support
Replies:1
Views:984
Last Post by support
26 Sep 2019 12:30
error Run time is over the limit in license "Multipurpose"
Category: Reading, Writing, Subscriptions, Property Access
Topic started 07 Aug 2019 06:11, by LuisGar
Last Post 14 Aug 2019 12:15
by support
Replies:4
Views:1597
Last Post by support
14 Aug 2019 12:15
Getting 'Read not completed' and 'Write not completed' errors
Category: Reading, Writing, Subscriptions, Property Access
Topic started 16 Jul 2019 12:06, by LuisGar
Last Post 03 Aug 2019 06:16
by support
Replies:13
Views:2833
Last Post by support
03 Aug 2019 06:16
Disabling automatic subscriptions made with OPC Reads
Category: Reading, Writing, Subscriptions, Property Access
Topic started 10 Mar 2014 10:45, by support
Last Post 22 Jul 2019 09:39
by support
Replies:3
Views:10.3k
Last Post by support
22 Jul 2019 09:39
Dataquality of 32
Category: Reading, Writing, Subscriptions, Property Access
Topic started 13 Jun 2019 18:33, by bussellk
Last Post 14 Jun 2019 05:59
by support
Replies:1
Views:1257
Last Post by support
14 Jun 2019 05:59
Best Practices - Instance vs Singleton
Category: Reading, Writing, Subscriptions, Property Access
Topic started 29 May 2019 08:14, by davide
Last Post 30 May 2019 14:18
by support
Replies:1
Views:1534
Last Post by support
30 May 2019 14:18
OPC DA and Docker
Category: Reading, Writing, Subscriptions, Property Access
Topic started 17 May 2019 14:21, by davide
Last Post 17 May 2019 14:28
by support
Replies:1
Views:2805
Last Post by support
17 May 2019 14:28
C# Read Array of strings or numbers
Category: Reading, Writing, Subscriptions, Property Access
Topic started 12 Jun 2013 13:40, by trobalo
Last Post 15 May 2019 05:34
by jomyver
Replies:3
Views:8931
Last Post by jomyver
15 May 2019 05:34
Best Practices - ReadMultipleItems vs SubscribeMultipleItems
Category: Reading, Writing, Subscriptions, Property Access
Topic started 13 May 2019 13:21, by davide
Last Post 13 May 2019 16:29
by support
Replies:1
Views:1507
Last Post by support
13 May 2019 16:29
Time to create page: 0.072 seconds