IOF_GetBoxNameByAddr 1:

The IOF_GetBoxNameByAddr function block determines the box name, knowing the device ID and the fieldbus address of a box (box = slave, module, station). If no fieldbus address is available, a physical or a logical address can be supplied as a fieldbus address to the function block (In the case of the Beckhoff Lightbus, for instance, it is the physical box number in the optical fiber ring). When successful the function block returns the box identifier configured in TwinCAT as a string.


    NETID     : T_AmsNetId;
    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.

DEVICEID: DeviceID specifies the device on which the function is to be executed. The device IDs are specified by the TwinCAT system during the hardware configuration.

BOXADDR: The fieldbus address of the box.

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;
    BOXNAME : T_MaxString;

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.

BOXNAME: The box name as a string (type: T_MaxString).


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)