Function Block
A function block groups an algorithm and a set of private data. It has inputs and outputs. - Blinker.
Inputs
|
Input |
Data Type |
Range |
Unit |
Default |
Description |
|---|---|---|---|---|---|
|
RUN |
BOOL |
|
|
|
Enabling command. |
|
CYCLE |
TIME |
|
|
|
Blinking period. |
Outputs
|
Output |
Data Type |
Range |
Unit |
Description |
|---|---|---|---|---|
|
Q |
BOOL |
|
|
Output blinking signal. |
Remarks
- The output signal is FALSE when the RUN input is FALSE.
- The CYCLE input is the complete period of the blinking signal.
Time Diagram
FBD Language Example
FFLD Language Example
- In the FFLD "Free Form Ladder Diagram" Language, the input rung is the IN command.
- The output rung is the Q output.
IL Language Example
(* MyBlinker is a declared instance of BLINK function block *)
Op1: CAL MyBlinker (RUN, CYCLE)
FFLD MyBlinker.Q
ST Q
ST Language Example
(* MyBlinker is a declared instance of BLINK function block *)
MyBlinker (RUN, CYCLE);
Q := MyBlinker.Q;
See Also
