Plug-ins > Mitgelieferte User-Plug-ins > Formel > Beispiel: Checksummenberechnung

Die nachfolgenden Formeln dienen als Kopiervorlage und können aus der Hilfe heraus in den Formel-Editor per Copy&Paste kopiert werden:

Formel 1 (Simulationsstart, Initialisierung)

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal1") = 23500;

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal2") = 125;

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal3") = 1550;

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal4") = 2000;

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal5") = 230;

Formel 2 (Vor den Senden, Zyklische Wertänderung)

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal1") =

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal1") + 1 +

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal1") / 2;

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal2") =

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal1") - 1;

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal3") =

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal3") +

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal1");

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal4") =

4095 - Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal3");

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal5") =

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal1") /

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal2");

Formel 3 (Nach Formel 2, Checksumme berechnen)

Checksum = MsgByte("//CAN-DB/CAN0/CanEasy/Datenpaket",0)

^ MsgByte("//CAN-DB/CAN0/CanEasy/Datenpaket",1)

^ MsgByte("//CAN-DB/CAN0/CanEasy/Datenpaket",2)

^ MsgByte("//CAN-DB/CAN0/CanEasy/Datenpaket",3)

^ MsgByte("//CAN-DB/CAN0/CanEasy/Datenpaket",4)

^ MsgByte("//CAN-DB/CAN0/CanEasy/Datenpaket",5)

^ MsgByte("//CAN-DB/CAN0/CanEasy/Datenpaket",6);

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Checksumme") = Checksum;

Formel 4 (Nach Formel 3, Manipulation eines Signals)

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal1") =

Sig("//CAN-DB/CAN0/CanEasy/Datenpaket/Signal1") - 1;

Formel 5 (Nach dem Senden, Checksumme prüfen)