AdsClientReadValueAsync(ISymbol, CancellationToken) Method

Read value as an asynchronous operation.

Namespace: TwinCAT.Ads
Assembly: TwinCAT.Ads (in TwinCAT.Ads.dll) Version: 7.0.0+e56d35ccc4675faac24789a4aab60071fc61d470

Syntax

C#

public 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<ResultAnyValue> representing the asynchronous operation.

Implements

IAdsSymbolicAccessReadValueAsync(ISymbol, CancellationToken)

Exceptions

Exception	Condition
ObjectDisposedException
ClientNotConnectedException
ArgumentNullException	symbol
CannotResolveDataTypeException

Remarks

This method automatically marshals the read values to appropriate .NET objects if possible. The overall behaviour is described here in the interface description.

Reference

AdsClient Class ReadValueAsync Overload TwinCAT.Ads Namespace ReadValue(ISymbol) ReadValue(ISymbol) TryReadValue(ISymbol, Object)

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