OPC UA Standard|Forum|OPC Foundation Log InSelect ForumAnnouncementsProduct and Service RequestsSuggestionsOPC MarketplaceOPC UA StandardOPC UA Companion StandardsOPC UA Implementation: Stacks, Tools, an…OPC Certification and Interoperability T…Classic OPC: DA, A&E, HDA, XML-DA, e…Miscellaneous SearchAdvanced SearchSearchForum ScopeCurrent forumAll forumsMatchMatch any wordMatch all wordsMatch phraseForum OptionsPosts onlyTopic titles onlyPosts and topic titlesMinimum search word length is 3 characters - maximum search word length is 84 characters Search Login name Password Remember me Lost password? HomeForumOPC UA Standard OPC UA StandardQuestions about OPC UA technology and specifications etc.Page: 12345 59 Is it allowed to set the value to null on a mandatory property in an EventType?Started By Mikael Eklund - 08/12/2026 - 01:07Replies: 5 Views: 323 Last Post Alexander Allmendinger - 1 week ago Bibliography in 10000-1 with wrong text and linkStarted By Thomas Schulz_2 - 08/19/2026 - 06:23Replies: 1 Views: 212 Last Post Jim Luth_1 - 1 month ago Figure B.8 missing in OPC 10000-3Started By Thomas Schulz_2 - 08/10/2026 - 00:27Replies: 2 Views: 185 Last Post Thomas Schulz_2 - 2 months ago Intro sentence of 9.1 General; OPC 10000-3; OPC Unified Architecture Part 3 :Address Space Model; Release 1.05.06; 2025-10-22Started By Thomas Schulz_2 - 08/10/2026 - 01:03Replies: 2 Views: 158 Last Post Thomas Schulz_2 - 2 months ago Need Guidance on PublishRequest TimeoutHintStarted By Ross Turton - 06/19/2026 - 08:44Replies: 1 Views: 216 Last Post Randy Armstrong - 3 months ago QuantitiesFolderType and UserCredentialCertificateType removed from standardStarted By Mattias Häggkvist - 05/04/2026 - 08:17Replies: 5 Views: 328 Last Post Randy Armstrong - 4 months ago Confusion about error codesStarted By Patrick Berger - 12/12/2025 - 02:09Replies: 5 Views: 563 Last Post Randy Armstrong - 4 months ago Facing issue of disconnect after 57 minutes in OPCUA server built on Dot net , using OPCUACore.dll version 1.5.374.158Started By Vinay Salian - 05/20/2026 - 20:50Replies: 1 Views: 190 Last Post Randy Armstrong - 4 months ago Server Index in NodeIdStarted By CHIRANTAN JOSHI - 03/20/2024 - 00:15Replies: 1 Views: 845 Last Post Sebastian Allmendinger - 7 months ago Change of Namespaces after the server has startedStarted By Siyuan Xu - 03/02/2026 - 03:36Replies: 2 Views: 296 Last Post Siyuan Xu - 7 months ago Namespace of BrowseNames of standard FileType methods Open/Close,...Started By Nico Buhl - 03/02/2026 - 00:05Replies: 1 Views: 322 Last Post Randy Armstrong - 7 months ago Structure with subtyping and Optional fieldsStarted By Rahul Rahul_1 - 02/23/2024 - 04:57Replies: 9 Views: 1235 Last Post Randy Armstrong - 7 months agoPage: 12345…59 Forum Timezone: America/PhoenixMost Users Ever Online: 1361Currently Online: Guest(s) 27Currently Browsing this Page: 8 Guest(s)Top Posters: Forum Stats: Groups: 2Forums: 10Topics: 1532Posts: 5184 Usage Policy © Simple:Press — Privacy Policy New / Updated TopicsIs it allowed to set the value to null o…Bibliography in 10000-1 with wrong text …Figure B.8 missing in OPC 10000-3Intro sentence of 9.1 General; OPC 10000…Need Guidance on PublishRequest TimeoutH…QuantitiesFolderType and UserCredentialC…Confusion about error codesFacing issue of disconnect after 57 min…Tool used to generate OPC UA node setNo endpoints discovredUnable to test method call with UACTT Li…Model Compiler usage for client sideOPC UA Client Application Certificate Se…PHP or Javascript implementationHow to develop an OPC Xi (WCF) Server OPC Core Components Redistributables ICE…OPC Core Components Redistributables Err…How to Develop a OPC DA Client in 2026Missing OPCAutomation.dll After Installi…