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5.3 Sonderfunktionen
LOGO!Soft Comfort Online-Hilfe
Betriebsanleitung, 11/2017
317
Mögliche Fehler: Division durch Null und Überlauf
Wenn die Ausführung des Funktionsblocks Mathematische Funktionen in der Division durch
Null oder einem Überlauf resultiert, werden interne Bits gesetzt, die den aufgetretenen
Fehler angeben. Sie können in Ihrem Schaltprogramm einen Funktionsblock
Fehlererkennung Mathematische Funktionen programmieren, um diese Fehler zu erkennen
und das Programmverhalten wie erforderlich zu steuern. Sie programmieren für jeden
Funktionsblock "Mathematische Funktionen" einen Funktionsblock "Fehlererkennung
Mathematische Funktionen (Seite 379)".
Beispiele
Die folgenden Tabellen zeigen einige einfache Beispiele für Parameter des Blocks
Mathematische Funktionen mit den resultierenden Gleichungen und den Ausgangswerten:
V1
Operator1
(Priorität 1)
V2
Operator2
(Priorität 2)
V3
Operator3
(Priorität 3)
V4
12
+ (M)
6
/ (H)
3
- (L)
1
Gleichung:
(12 + (6 / 3)) - 1
Ergebnis:
13
V1
Operator1
(Priorität 1)
V2
Operator2
(Priorität 2)
V3
Operator3
(Priorität 3)
V4
2
+ (L)
3
* (M)
1
+ (H)
4
Gleichung:
2 + (3 * (1 + 4))
Ergebnis:
17
V1
Operator1
(Priorität 1)
V2
Operator2
(Priorität 2)
V3
Operator3
(Priorität 3)
V4
100
- (H)
25
/ (L)
2
+ (M)
1
Gleichung:
(100 25) / (2 + 1)
Ergebnis:
25
Sonderfunktionen (Seite 249)
5.3.3.9
Analogfilter (nur 0BA7 und höher)
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