Function Block - Set dominant bistable.
SET1 : BOOL
Condition for forcing to TRUE (highest priority
command)
RESET : BOOL Condition for forcing to FALSE
Q1 : BOOL Output to be forced
|
SET1 |
RESET |
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 |
1 |
|
1 |
1 |
1 |
1 |
The output is unchanged when both inputs are FALSE. When both inputs are TRUE, the output is forced to TRUE (set dominant).
(* MySR is declared as an instance of SR
function block *)
MySR (SET1, RESET);
Q1 := MySR.Q1;
(* the SET1 command is the
rung - the rung is the output *)
(* MySR is declared as an instance of SR
function block *)
Op1: CAL MySR (SET1, RESET)
LD MySR.Q1
ST Q1