FB_ScaleOutput

Description

Scale LREAL to DINT .

This Kollmorgen UDFB"User Defined Function Block" UDFB can be used as a sub-function block in another program of the application. It is described using FBD, LD, ST or IL language. Input / output parameters of a UDFB (as well as private variables) are declared in the variable editor as local variables of the UDFB converts un-scaled LREAL values from a PLC"Programmable Logic Controller" A Programmable Logic Controller, PLC, or Programmable Controller is a digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines. Used to synchronize the flow of inputs from (physical) sensors and events with the flow of outputs to actuators and events Program into units of type DINT that can be mapped to an analog output. 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 7-194: Scale Output

 

Arguments

Input

InputSignal	Description	Un-scaled input signal
	Data type	LREAL
	Range	[0 , 4]
	Unit	n/a
	Default	—

InputMin	Description	Minimum value of accepted input signal range
	Data type	LREAL
	Range	[0 , 4]
	Unit	n/a
	Default	—

InputMax	Description	Maximum value of accepted input signal range
	Data type	LREAL
	Range	[0 , 4]
	Unit	n/a
	Default	—

OutputMin	Description	Output value mapped to the InputMin
	Data type	DINT
	Range	[0 , 4]
	Unit	n/a
	Default	—

OutputMax	Description	Output value mapped to the InputMax
	Data type	DINT
	Range	[0 , 4]
	Unit	n/a
	Default	—

Output

OutputSignal	Description	Scaled value of the Input Signal with type converted to DINT. Stays within specified Min/Max output values
	Data type	DINT
	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 to a drive.

Related Functions

UDFB ScaleInput

Example

Structured Text

Inst_ScaleOutput1( ScaleOutput_In2, ScaleOutput_In2_Min,ScaleOutput_In2_Max, ScaledOutput_2_Min, ScaledOutput_2_Max ); ScaledOutput_2:=Inst_ScaleOutput1.OutputSignal; ScaledOutput_2_Err:=Inst_ScaleOutput1.OutsideRange;

Ladder Diagram

 

Function Block Diagram

 

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