DataTypeExtensionHasExternalDataReferences(IInstance) Method
Indicates, that the Instance value includes process memory data, that cannot be read in one memory block.
Namespace: TwinCAT.TypeSystem
Assembly: TwinCAT.Ads.Abstractions (in
TwinCAT.Ads.Abstractions.dll) Version:
7.0.0+e56d35ccc4675faac24789a4aab60071fc61d470
Syntax
C#
public static bool HasExternalDataReferences(
this IInstance instance
)Return Value
Boolean
true if the value of the instance is
split into more than one memory block, false otherwise.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IInstance. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
Remarks
This is the case, if the DataType contains static fields, Pointers or References that contain these types of instances/datatypes. The Value of the instance cannot be read in one ADS roundtrip.
Reference
DataTypeExtension Class HasExternalDataReferences Overload TwinCAT.TypeSystem Namespace
Beckhoff Automation GmbH & Co. KG 2001-2026