AdsServer.OnReadAsync Method
Called when an ADS Read indication is received.
Namespace: TwinCAT.Ads.Server
Assembly: TwinCAT.Ads.Server (in TwinCAT.Ads.Server.dll) Version: 7.0.0+e56d35ccc4675faac24789a4aab60071fc61d470
Syntax
C#
protected virtual Task<ResultReadBytes> OnReadAsync(
AmsAddress sender,
uint invokeId,
uint indexGroup,
uint indexOffset,
int readLength,
CancellationToken cancel
)Parameters
|
sender AmsAddress |
The sender address of the request. |
|
invokeId UInt32 |
The invoke identifier of the request. |
|
indexGroup UInt32 |
The index group of the requested ADS service |
|
indexOffset UInt32 |
The index offset of the requested ADS service |
|
readLength Int32 |
The number of bytes to be read |
|
cancel CancellationToken |
The cancellation token. |
Return Value
Task<ResultReadBytes>
A task that represents the asynchronous ReadIndicationAsync(AmsAddress, UInt32, UInt32, UInt32, Int32, CancellationToken) operation. The Task<TResult> parameter contains the AdsErrorCode as
Result.
Remarks
Overwrite this method in derived classes to react on ADS Read indications. The default implementation replies with an ADS ServiceNotSupported error code (0x701).