IOL_MeasurementDataChannel

The measuring data channel defines the process data structure, functions, and presentation of measuring sensors. The function block is defined to provide derived status signals and enable a standardized interface for user programs.

Inputs

Name	Type	Description
Enable	BOOL	Activates the use of the function block
ProfileID	WORD	Selected ProfileID, or process data layout 1 = SSP 3.1 = profile 0x000A 2 = SSP 3.2 = profile 0x000B 3 = SSP 3.3 = profile 0x000C 4 = SSP 3.4 = profile 0x000D
SubstituteValue	DINT	The specified value is applied to ValueReal and ValueDINT if ValueStatus is not 0.
ChannelState	E_IolPortState
ScaleIN	SINT	Scale of the IO-Link device
ProcessData	ANY_INT	Measured value

Outputs

Name	Type	Description
Valid	BOOL	If true, the supplied values are valid and can be used for further calculations.
Error	BOOL	If true, an internal error is detected and further information is provided by the function block.
ValueStatus	E_IoLMDC_ValueStatus	Provides error codes
ValueReal	LREAL	Process data in real format for evaluation in the PLC
ValueINT	DINT	Process data in Dint format for evaluation in the PLC
Scale	INT	Process data scaling factor

Example

The following function block is part of the IoLink sample project. For more information, see the chapter Samples.

FUNCTION_BLOCK FB_Sample_07_MeasurementDataChannel
VAR_INPUT
  nStateChannel    AT%I*:USINT;
  nScale           AT%I*:SINT;
  MVDistance       AT%I*:INT;
END_VAR
VAR_OUTPUT
  bValid          :BOOL;
  bError          :BOOL;
  nValueStatus    :E_IolMdc_ValueStatus;
  nValueDINT      :DINT;
  nValueREAL      :REAL;
  nScaleOut       :INT;
END_VAR
VAR
  fbMeasurement:IOL_MeasurementDataChannel_INT;
END_VAR

fbMeasurement(
  Enable := TRUE,
  SubstituteValue := 500,
  ChannelState := nStateChannel,
  ScaleIn := nScale , 
  MeasurementValue := MVDistance,
  Valid=>bValid,
  Error=>bError,
  ValueStatus=>nValueStatus,
  ValueReal=>nValueREAL,
  ValueDINT=>nValueDINT 
  Scale=>nScaleOut );

Requirements

Development environment	Required PLC library
TwinCAT from v3.1.4024.25	Tc3_IoLink from v3.3.4.0