ADSWRTCTL

This function block permits the execution of an ADS control command to affect the state of an ADS device, e.g. to start, stop or reset a device.

Inputs

VAR_INPUT
    NETID     : T_AmsNetId;
    PORT      : T_AmsPort;
    ADSSTATE  : UINT;
    DEVSTATE  : UINT;
    LEN       : UDINT;
    SRCADDR   : PVOID;
    WRITE     : BOOL;
    TMOUT     : TIME := DEFAULT_ADS_TIMEOUT;
END_VAR

Name	Type	Description
NETID	T_AmsNetId	String containing the AMS network ID of the target device to which the ADS command is addressed (type: T_AmsNetId).
PORT	T_AmsPort	Port number of the ADS device (type: T_AmsPort).
ADSSTATE	UINT	State identification code of the ADS target device.
DEVSTATE	UINT	Contains the specific state identification code of the ADS target device. The codes given here are supplementary information which is specific to the ADS device.
LEN	UDINT	Number of data to be written in bytes.
SRCADDR	PVOID	Address of the buffer from which the data to be written is to be fetched. The programmer is himself responsible for dimensioning the buffer to such a size that 'LEN' bytes can be taken from it. The buffer can be a single variable, an array or a structure, whose address can be found with the ADR operator.
WRITE	BOOL	The ADS command is triggered by a rising edge at this input.
TMOUT	TIME	Indicates the time before the function is canceled.

State identification code of the ADS target device

The codes shown here are specified for all ADS servers:

ADSSTATE_IDLE = 1;
ADSSTATE_RESET = 2;
ADSSTATE_INIT = 3;
ADSSTATE_START = 4;
ADSSTATE_RUN= 5;
ADSSTATE_STOP = 6;
ADSSTATE_SAVECFG = 7;
ADSSTATE_LOADCFG = 8;

Outputs

VAR_OUTPUT
    BUSY    : BOOL;
    ERR     : BOOL;
    ERRID   : UDINT;
END_VAR

Name	Type	Description
BUSY	BOOL	This output remains TRUE until the function block has executed a command, but at the longest for the duration supplied to the Timeout input. No new commands are accepted at the inputs as long as BUSY = TRUE. Note that it is not the execution of the service but its acceptance whose time is monitored.
ERR	BOOL	This output is switched to TRUE as soon as an error occurs during the execution of a command. The command-specific error code is contained in ERRID. If the function block has a timeout error, ERR is TRUE and ERRID is 1861 (hexadecimal 0x745). Is reset to FALSE by the execution of a command at the inputs.
ERRID	UDINT	ADS error code or command-specific error code of the last executed command. Is reset to 0 by the execution of a command at the inputs.

Example of calling the block in FBD:

ADSWRTCTL 4:

In the example a reset command (ADSSTATE=2) is sent to the I/O server (Port300), along with supplementary data hex.AFFE. As a result the I/O server executes a bus reset.

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)