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:
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
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