FB_ScaleInput

Description

Scale DINT to LREAL.

Converts un-scaled DINT values from Analog Inputs into user units of type LREAL. The input signal is converted based on a linear mapping automatically calculated by two points entered. InputMin is mapped to OutputMin, InputMax is mapped to OutputMax, and all values in between are scaled automatically. If an input value is not between the selected Min/Max, the Boolean output OutsideRange turns TRUE, and the OutputSignal is set to the corresponding OutputMin or OutputMax value.

The following figure shows the function block I/O:

Figure 8-226: Scale Input

 

Arguments

Input

InputSignal	Description	Un-scaled input signal
	Data type	DINT
	Range	[0 , 4]
	Unit	N/A
	Default	—
InputMin	Description	Minimum value of accepted input signal range
	Data type	DINT
	Range	[0 , 4]
	Unit	N/A
	Default	—
InputMax	Description	Maximum value of accepted input signal range
	Data type	DINT
	Range	[0 , 4]
	Unit	N/A
	Default	—
OutputMin	Description	Output value mapped to the InputMin
	Data type	LREAL
	Range	[0 , 4]
	Unit	N/A
	Default	—
OutputMax	Description	Output value mapped to the InputMax
	Data type	LREAL
	Range	[0 , 4]
	Unit	N/A
	Default	—

Output

OutputSignal	Description	Scaled value of the Input Signal with type converted to LREAL. Stays within specified Min/Max output values
	Data type	LREAL
	Unit	N/A
OutsideRange	Description	True if InputSignal is outside range setup by min/max values, otherwise FALSE
	Data type	BOOL
	Unit	N/A

Usage

Scale an analog signal from a drive.

Related Functions

UDFB ScaleOutput

Example

Structured Text

//Scale an integer based analog input signal into floating point LREAL variable
ScaleInput_1( Analog_In, Analog_In_Min, Analog_In_Max, LREAL_Out_Min, LREAL_Out_Max );
LREAL_OutputSignal:= ScaleInput_1.OutputSignal;
Analog_Range_Err:= ScaleInput_1.OutsideRange;

Ladder Diagram

 

Function Block Diagram

 

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