IOF_GetDeviceIDByName 1:

The IOF_GetDeviceIDByName function block determines the device ID of an IO device, knowing the device name. When successful, the function block returns the device ID specified by the TwinCAT system during the configuration. The device IDs cannot be configured by the user.


    NETID      : T_AmsNetId;
    DEVICENAME : T_MaxString;
    START      : BOOL;

NETID: The network address of the TwinCAT computer on which the function is to be executed can be entered here (type: T_AmsNetID). If it is to be run on the local computer, an empty string can be entered.

DEVICENAME: The device name of an IO device (type: T_MaxString).

START: the block is activated by a positive edge at this input.

TMOUT: States the length of the timeout that may not be exceeded during execution of the command.


    BUSY     : BOOL;
    ERR      : BOOL;
    ERRID    : UDINT;

BUSY: When the function block is activated this output is set. It remains set until a feedback is received.

ERR: If an error should occur during the transfer of the command, then this output is set once the BUSY output was reset.

ERRID: Supplies the ADS error number when the ERR output is set.

DEVICEID: The device ID of an I/O device.


Development environment

Target platform

IO hardware

PLC libraries to be integrated (category group)

TwinCAT v3.1.0

PC or CX (x86, x64, ARM)

All IO devices

Tc2_IoFunctions (IO)