ADSREADRES

The ADSREADRES function block acknowledges Indications of a PLC task. A response is sent to the ADS source device via a positive edge on the RESPOND input. The source device is addressed via the PORT and NETID parameters. The INVOKEID parameter is used by the source device to assign the responses to the requests and is adopted by the output of the ADSREADIND function block. An error code can be returned to the ADS source device via the RESULT parameter.

Inputs

VAR_INPUT
    NETID     : T_AmsNetId;
    PORT      : T_AmsPort;
    INVOKEID  : UDINT;
    RESULT    : UDINT;
    LEN       : UDINT;
    DATAADDR  : PVOID;
    RESPOND   : BOOL;
END_VAR

Name	Type	Description
NETID	T_AmsNetId	String containing the AMS network ID of the source device, to which the ADS command is to be sent (type: T_AmsNetId).
PORT	T_AmsPort	Port number of the ADS source device to which the response should be sent (type: T_AmsPort).
INVOKEID	UDINT	Handle of the command, which was sent. The InvokeID is specified from the source device and serves to identify the commands.
RESULT	UDINT	ADS error code or command-specific error code to be sent to the source device.
LEN	UDINT	Number of data to be read in bytes.
DATAADDR	PVOID	Address of the data buffer, which should be read.
RESPOND	BOOL	The function block is activated by a positive edge at this input.

Outputs

VAR_OUTPUT
(*none*)
END_VAR

Example of calling the block in ST:

Example with AdsReadInd /AdsReadRes function blocks

Requirements

Development environment	Target system type	PLC libraries to include (Category group)
TwinCAT v3.1.0	PC or CX (x86, x64, ARM)	Tc2_System (System)