RS
Function Block - Reset dominant bistable.
Inputs
|
Input |
Data type |
Description |
|
SET |
BOOL |
Condition for forcing to TRUE. |
|
RESET1 |
BOOL |
Condition for forcing to FALSE (highest priority command). |
Outputs
|
Output |
Data type |
Description |
|
Q1 |
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).
ST Language
MyRS is declared as an instance of RS function block:
MyRS (SET, RESET1);
Q1 := MyRS.Q1;
FBD Language
LD Language
The SET command is the rung - the rung is the output:
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