IOF_GetDeviceName 1:

The IOF_GetDeviceName function block reads the device name of an IO device. The device identifier can be specified by the user during the configuration in the TwinCAT system. When the system starts up it is then sent as a string to the I/O drivers, and can be read by the ADS commands. The I/O device whose device identifier is to be read is specified by the input variable DEVICEID.


    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.

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;
    DEVICENAME : 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.

DEVICENAME: The device name of the IO device (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)