IAdsHandleAccess.TryReadWrite Method

Writes data synchronously to an ADS device and then Reads data from this device.

Namespace:  TwinCAT.Ads
Assembly:  TwinCAT.Ads (in TwinCAT.Ads.dll) Version: 4.3.0.0

Syntax

C#

AdsErrorCode TryReadWrite(
    int variableHandle,
    AdsStream rdDataStream,
    int rdOffset,
    int rdLength,
    AdsStream wrDataStream,
    int wrOffset,
    int wrLength,
    out int readBytes
)

VB

Function TryReadWrite ( 
    variableHandle As Integer,
    rdDataStream As AdsStream,
    rdOffset As Integer,
    rdLength As Integer,
    wrDataStream As AdsStream,
    wrOffset As Integer,
    wrLength As Integer,
    <OutAttribute> ByRef readBytes As Integer
) As AdsErrorCode

Parameters

variableHandle

Type: System.Int32
Variable handle.

rdDataStream

Type: TwinCAT.Ads.AdsStream
Stream that receives the data that has been read.

rdOffset

Type: System.Int32
Offset of the data in rdDataStream.

rdLength

Type: System.Int32
Length of the data in rdDataStream.

wrDataStream

Type: TwinCAT.Ads.AdsStream
Stream that contains the data that should be written.

wrOffset

Type: System.Int32
Offset of the data in wrDataStream.

wrLength

Type: System.Int32
Length of the data in wrDataStream.

readBytes

Type: System.Int32.
The read bytes.

Return Value

Type: AdsErrorCode
AdsErrorCode.

Exceptions

Exception

Condition

ArgumentException

Reference

IAdsHandleAccess Interface

TwinCAT.Ads Namespace