TcAdsClient.ReadWrite Method (UInt32, UInt32, AdsStream, Int32, Int32, AdsStream, Int32, Int32)

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#

public int ReadWrite(
    uint indexGroup,
    uint indexOffset,
    AdsStream rdDataStream,
    int rdOffset,
    int rdLength,
    AdsStream wrDataStream,
    int wrOffset,
    int wrLength
)

VB

Public Function ReadWrite ( 
    indexGroup As UInteger,
    indexOffset As UInteger,
    rdDataStream As AdsStream,
    rdOffset As Integer,
    rdLength As Integer,
    wrDataStream As AdsStream,
    wrOffset As Integer,
    wrLength As Integer
) As Integer

Parameters

indexGroup	Type: System.UInt32 Contains the index group number of the requested ADS service.
indexOffset	Type: System.UInt32 Contains the index offset number of the requested ADS service.
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.

Return Value

Type: Int32
Number of successfully returned data bytes.

Exceptions

Exception	Condition
AdsErrorException	Thrown when the ADS call fails.

Reference

TcAdsClient Class

ReadWrite Overload

TwinCAT.Ads Namespace