IAdsSymbolicAccess.ReadValueAsync(ISymbol, CancellationToken) Method
Reads the value of a symbol as an asynchronous operation and returns the value as an (boxed) object.
Namespace: TwinCAT.Ads
Assembly: TwinCAT.Ads.Abstractions (in TwinCAT.Ads.Abstractions.dll) Version: 7.0.0+e56d35ccc4675faac24789a4aab60071fc61d470
Syntax
C#
Task<ResultAnyValue> ReadValueAsync(
ISymbol symbol,
CancellationToken cancel
)Parameters
|
symbol ISymbol |
The symbol that should be read. |
|
cancel CancellationToken |
The cancel token. |
Return Value
Task<ResultAnyValue>
A task that represents the asynchronous read operation. The ResultAnyValue parameter contains the read value
(Value) and the ErrorCode after execution.
Remarks
This method automatically marshals the read values to appropriate .NET objects if possible. The overall behaviour is described here in the interface description.
See Also
Reference
IAdsSymbolicAccess Interface ReadValueAsync Overload TwinCAT.Ads Namespace ReadValue(ISymbol) ReadValue(ISymbol) TryReadValue(ISymbol, Object)
Beckhoff Automation GmbH & Co. KG 2001-2026