IOF_GetDeviceName

IOF_GetDeviceName 1:

The IOF_GetDeviceName function block reads the device name of an I/O device. The device name can be specified by the user during the configuration in the TwinCAT system. This is then sent as a string to the I/O driver at system startup and can be read using the ADS commands. The DEVICEID input variable is used to specify the I/O device whose device name is to be read.

IOF_GetDeviceName 2: Inputs

VAR_INPUT
    NETID     : T_AmsNetId;
    DEVICEID  : UDINT;
    START     : BOOL;
    TMOUT     : TIME := DEFAULT_ADS_TIMEOUT;
END_VAR

Name

Type

Description

NETID

T_AmsNetId

The network address of the TwinCAT computer on which the ADS command is to be executed can be specified here. For the local computer an empty string may be specified.

DEVICEID

UDINT

DeviceId specifies the I/O device on which the function is to be executed. The device IDs are specified by the TwinCAT system during the hardware configuration.

START

BOOL

The function block is enabled by a positive edge at this input.

TMOUT

TIME

Specifies the time-out period that must not be exceeded when the command is executed.

IOF_GetDeviceName 3: Outputs

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

Name

Type

Description

BUSY

BOOL

When the function block is enabled, this output is set and remains set until a feedback is received.

ERR

BOOL

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

ERRID

UDINT

Returns the ADS error number when the ERR output is set.

DEVICENAME

T_MaxString

The device name of an I/O device as a string.

Requirements

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)