FB_ScaleOutput - Scaling Analog IO
Function Block
A function block groups an algorithm and a set of private data. It has inputs and outputs. - 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.
Inputs
|
Input |
Data Type |
Range |
Unit |
Default |
Description |
|---|---|---|---|---|---|
|
InputSignal |
LREAL |
0, 4 |
N/A |
No default |
Un-scaled input signal. |
|
InputMin |
LREAL |
0, 4 |
N/A |
No default |
Minimum value of accepted input signal range. |
|
InputMax |
LREAL |
0, 4 |
N/A |
No default |
Maximum value of accepted input signal range. |
|
OutputMin |
DINT |
0, 4 |
N/A |
No default |
Output value mapped to the InputMin. |
|
OutputMax |
DINT |
0, 4 |
N/A |
No default |
Output value mapped to the InputMax. |
Outputs
|
Output |
Data Type |
Range |
Unit |
Description |
|---|---|---|---|---|
|
OutputSignal |
DINT |
|
N/A |
Scaled value of the Input Signal with type converted to DINT. Stays within specified Min/Max output values. |
|
OutsideRange |
BOOL |
|
N/A |
TRUE if the InputSignal is outside the range setup by min/max values, otherwise FALSE. |
Remarks
- The scale LREAL to DINT 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.
- The OutputSignal is set to the corresponding OutputMin or OutputMax value.
This image shows the function or function block I/O.
Figure 6-110: Scale Output
Usage
Scale an analog signal from a drive.
FBD Language Example
FFLD Language Example
IL Language Example
Not available.
ST Language Example
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;
See Also
