Set REFERENCE to 0 (null) when no longer used ^{CODESYS Forge talk (Thread)}
Set REFERENCE to 0 (null) when no longer used
Last updated: 2024-10-07

Post by dogulas on OPC UA C# client connecting to OPC UA CODESYS server ^{CODESYS Forge talk (Post)}
Ok, I have a simple test environment. From C#, using OPC UA, I can read DINTs, write DINTs, read Structs, but when I try to write a struct I get BadNotWritable. I am using Communication Manager, OPC UA Server, and IEC Symbol Publishing. I have a struct defined with one single DINT in it. The instance of the struct is in GVL. The struct is marked read/write in IEC Symbol Publishing. Any ideas? Pointers are welcome. public static async Task WriteStructA(byte[] structAData) { if (_session == null) throw new Exception("session is null"); // create a RequestHeader RequestHeader requestHeader = new RequestHeader { Timestamp = DateTime.UtcNow, TimeoutHint = 30000 // timeout in milliseconds }; // create an ExtensionObject to wrap the value to be written ExtensionObject extensionObject = new ExtensionObject( new ExpandedNodeId("GVL_StructA", 5), structAData ); // create a WriteValue object to hold the value to be written WriteValue writeValue = new WriteValue { NodeId = _structANodeId, AttributeId = Attributes.Value, Value = new DataValue(extensionObject) }; // put the WriteValue object into a WriteValueCollection object WriteValueCollection writeValueCollection = new WriteValueCollection() { writeValue }; // perform the write operation asynchronously WriteResponse writeResponse = await _session.WriteAsync( requestHeader, writeValueCollection, CancellationToken.None ); // check the result of the write operation if (writeResponse.Results[0] != StatusCodes.Good) throw new Exception("Write failed: " + writeResponse.Results[0]); }
Last updated: 2024-12-17

'The object GUID 'xxxx' is not valid' message when trying to commit a project to SVN ^{CODESYS Forge talk (Thread)}
'The object GUID 'xxxx' is not valid' message when trying to commit a project to SVN
Last updated: 2022-09-14

Find Function: Object reference not set to an instance of an object. ^{CODESYS Forge talk (Thread)}
Find Function: Object reference not set to an instance of an object.
Last updated: 2023-10-30

Error - object reference not set to an instance of a object ^{CODESYS Forge talk (Thread)}
Error - object reference not set to an instance of a object
Last updated: 2016-06-13

Error: Object reference not set to an instance of an object ^{CODESYS Forge talk (Thread)}
Error: Object reference not set to an instance of an object
Last updated: 2017-08-23

codesys "profiler" object reference not set to an instance of an object ^{CODESYS Forge talk (Thread)}
codesys "profiler" object reference not set to an instance of an object
Last updated: 2023-01-11

Internal error:System.NullReferenceException: The object reference was not set to an object instance. ^{CODESYS Forge talk (Thread)}
Internal error:System.NullReferenceException: The object reference was not set to an object instance.
Last updated: 2024-05-24

Internal error:System.NullReferenceException: The object reference was not set to an object instance. ^{CODESYS Forge talk (Thread)}
Internal error:System.NullReferenceException: The object reference was not set to an object instance.
Last updated: 2024-05-24

How to get object attributes ^{CODESYS Forge talk (Thread)}
How to get object attributes
Last updated: 2018-01-30

Create dynamically visual object ^{CODESYS Forge talk (Thread)}
Create dynamically visual object
Last updated: 2010-06-15

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Last updated: 2019-02-06

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Last updated: 2022-03-14

Object Index Minimum for PDOs ^{CODESYS Forge talk (Thread)}
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Last updated: 2017-02-24

Edit Object Offline not working ^{CODESYS Forge talk (Thread)}
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Last updated: 2023-03-14

Object oriented V3: what hardware ? ^{CODESYS Forge talk (Thread)}
Object oriented V3: what hardware ?
Last updated: 2012-03-23

Distinguish object types in project tree ^{CODESYS Forge talk (Thread)}
Distinguish object types in project tree
Last updated: 2019-04-11

management object to visualizations ^{CODESYS Forge talk (Thread)}
management object to visualizations
Last updated: 2009-07-16

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Object oriented Web-Visu
Last updated: 2019-08-23

Cnc Visu object not showing inputs ^{CODESYS Forge talk (Thread)}
Cnc Visu object not showing inputs
Last updated: 2021-10-19

Order of synchronisation object creation ^{CODESYS Forge talk (Thread)}
Order of synchronisation object creation
Last updated: 2017-11-19

[Solved] Displaying Object Properties to Visualisation ^{CODESYS Forge talk (Thread)}
[Solved] Displaying Object Properties to Visualisation
Last updated: 2018-11-05

Visudialog.keypad and webbrowser Object visualization !! ^{CODESYS Forge talk (Thread)}
Visudialog.keypad and webbrowser Object visualization !!
Last updated: 2022-03-29

Codesys 3.5.18 No visualization object ^{CODESYS Forge talk (Thread)}
Codesys 3.5.18 No visualization object
Last updated: 2022-05-02

exported object annotation documentation ^{CODESYS Forge talk (Thread)}
exported object annotation documentation
Last updated: 2012-09-13

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