Function Block
A function block groups an algorithm and a set of private data. It has inputs and outputs. - Reset dominant bistable.
Inputs
|
Input |
Data Type |
Range |
Unit |
Default |
Description |
|---|---|---|---|---|---|
|
SET |
BOOL |
|
|
|
Condition for forcing to TRUE. |
|
RESET1 |
BOOL |
|
|
|
Condition for forcing to FALSE. Highest priority command. |
Outputs
|
Output |
Data Type |
Range |
Unit |
Description |
|---|---|---|---|---|
|
Q |
BOOL |
|
|
Output to be forced. |
Truth Table
|
SET |
RESET1 |
Q1 prev |
Q1 |
|---|---|---|---|
|
0 |
0 |
0 |
0 |
|
0 |
0 |
1 |
1 |
|
0 |
1 |
0 |
0 |
|
0 |
1 |
1 |
0 |
|
1 |
0 |
0 |
1 |
|
1 |
0 |
1 |
1 |
|
1 |
1 |
0 |
0 |
|
1 |
1 |
1 |
0 |
Remarks
- The output is unchanged when both inputs are FALSE.
- When both inputs are TRUE, the output is forced to FALSE. (reset dominant)
FBD Language
FFLD Language
IL Language
(* MyRS is declared as an instance of RS function block *)
Op1: CAL MyRS (SET, RESET1)
FFLD MyRS.Q1
ST Q1
ST Language
(* MyRS is declared as an instance of RS function block *)
MyRS (SET, RESET1);
Q1 := MyRS.Q1;
See Also
