Function Block
A function block groups an algorithm and a set of private data. It has inputs and outputs. - Calculates the average of signal samples.
Inputs
|
Input |
Data Type |
Range |
Unit |
Default |
Description |
|---|---|---|---|---|---|
|
RUN |
BOOL |
|
|
|
Enabling command. |
|
XIN |
REAL |
|
|
|
Input signal. |
|
N |
DINT |
|
|
|
Number of samples stored for average calculation. Cannot exceed 128. |
Outputs
|
Output |
Data Type |
Range |
Unit |
Description |
|---|---|---|---|---|
|
XOUT |
REAL |
|
|
Average of the stored samples (*). |
(*) averageL has LREAL arguments.
Remarks
- Average is calculated according to the number of stored samples.
- This can be less
than N when the block is enabled.
- The "N" input (or the number of samples) is taken into account only when the RUN input is FALSE.
- By default, the number of samples is 128.
- This can be less
than N when the block is enabled.
- The "RUN" must be reset after a change in the number of samples.
- Cycle the RUN input when you first call this function; this clears the default.
FBD Language
FFLD Language
- In the FFLD language, the input rung is the RUN command.
- The output rung keeps the state of the input rung.
- ENO has the same value as RUN.
IL Language
(* MyAve is a declared instance of AVERAGE function block *)
Op1: CAL MyAve (RUN, XIN, N)
FFLD MyAve.XOUT
ST XOUT
ST Language
(* MyAve is a declared instance of AVERAGE function block. *)
MyAve (RUN, XIN, N);
XOUT := MyAve.XOUT;
See Also
