VT10OnChTVar
V = Variables
T = Control functions
The VT10OnChTVar functiomn checks the value of a variable and set a flag if the value changes.
The flag is reset automatically after an adjustable time.
IMPLEMENTATION
VT10OnChVar (var01, changed)
Parameters:
| IN/OUT | VARIABLE TYPE | EXAMPLE NAME | DIM | |
|---|---|---|---|---|
| IN | SYSTEM / INPUT / OUTPUT | var01 | F/L | Variable to check |
| OUT | GLOBAL | changed | F | Change flag execute |
| IN | SYSTEM | time01 | L | Waiting time before reset flag to change value (msec) |
Example
In the example, if the variable 'pippo' changes its value and is activated the 'ofUscita' output.
slTimeRes = 10 VT10OnChVar (pippo, changed, slTimeRes)** IF changed SETOUT ofUscita ENDIF
Note
-
To be effective, the function should be placed at a point of the application that runs on every round.
-
The flag that signals the change is reset automatically from the function once the set time has passed.