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--- en:software:qview:qview_6:qcl_library:ir10edge [2017/01/20 11:36] – [IR10Edge] qem103
+++ en:software:qview:qview_6:qcl_library:ir10edge [2019/08/29 17:01] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+====== 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.|
+=== Example ===
+In the example the "ofUscita" output is activated on the rising edge of the input "Input" after a check of 1 second.
+<code QCL>
+gfInit = 0
+MAIN:
+</code>
+**IR10Edge ( Input, 1, 1000, gfInit, gfResult)**
+<code QCL>
+IF gfResult
+     gfResult = 0
+     SETOUT ofUscita
+ENDIF
+gfInit = 1
+WAIT 1
+JUMP MAIN
+END
+</code>
+=== Note ===
+  * 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.