IR10Edge

I = Input

R = Reading functions

The IR10Edge function detects the rising edge or falling is a digital signal.

IMPLEMENTATION

IR10Edge (Input, Type, Time, Init, Result)

Parameters:

IN/OUT	VARIABLE TYPE	EXAMPLE NAME	DIM
IN	INPUT GLOBAL	Input	F	Digital status to be analyzed
IN	CONST	Type	F	Front type to be analyzed, 0 for descent, 1 to rise.
IN	CONST	Time	L	Time signal verification. With zero value the time to check is disabled.
IN	GLOBAL	Init	F	Flag to inform if is the first execution of the function (0 for first time, 1 for subsequent)
OUT	GLOBAL	Result	F	Flag set to 1 when it encounters the front, otherwise it is left unchanged.

In the example the “ofUscita” output is activated on the rising edge of the input “Input” after a check of 1 second.

gfInit = 0
 
MAIN:

IR10Edge ( Input, 1, 1000, gfInit, gfResult)

IF gfResult
     gfResult = 0
     SETOUT ofUscita
ENDIF
gfInit = 1
 
WAIT 1
JUMP MAIN
END

In order to be effective, the function should be placed at a point of the application that runs on every logical round.
The result flag is set to 1 only if the front condition it occurs, otherwise it remains unchanged.
The Init flag this is useful if the unit was reactivated with TRESTART command and allows to initialize the function.