AdsReadReq

The AdsReadReq method enables the sending of an ADS read command for the data transmission from an ADS device.
AdsReadCon is called on receipt of the response.

Syntax


int AdsReadReq( AmsAddr& rAddr, ULONG invokeId, ULONG indexGroup, ULONG indexOffset, ULONG cbLength );

AdsReadReq 1: Return value

Type: int

Error code - see AdsStatuscodes.

Parameter

Name

Type

Description

rAddr

AmsAddr&

[in] Structure with NetId and port number of the ADS server.

invokeId

ULONG

[in] Handle of the command, which was sent. The InvokeId is specified by the source device and is used for the identification of the commands.

indexGroup

ULONG

[in] Contains the index group number (32-bit, unsigned) of the requested ADS service.

indexOffset

ULONG

[in] Contains the index offset number (32-bit, unsigned) of the requested ADS service.

cbLength

ULONG

[in] contains the length in bytes of the data to be read (pData).