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// -------------------------------------------------------------
// MISCHWERK-STEUERUNG FÜR SIEMENS LOGO (Node-RED Function Node)
// -------------------------------------------------------------
//
// Startbedingung:
// msg.payload = Anzahl der Mischzyklen (z.B. 10)
//
// LOGO-Ausgänge (Merker):
// merker_q1 = Motor EIN/AUS
// merker_q2 = Rechtslauf
// merker_q3 = Linkslauf
//
// Fortschritt:
// msg.progressText = "5 von 10 fertig"
// msg.progressValue = Prozentwert (0–100)
//
// -------------------------------------------------------------


// ------------------------------
// 1) INITIALISIERUNG
// ------------------------------
if (!context.get("initialized")) {
context.set("running", false); // Läuft gerade ein Mischvorgang?
context.set("targetCycles", 0); // Zielzyklen
context.set("currentCycle", 0); // Aktueller Zyklus
context.set("direction", "right"); // Start-Richtung
context.set("timer", null); // Timer-Objekt
context.set("initialized", true);
}


// ------------------------------
// 2) START DES MISCHVORGANGS
// ------------------------------
// Wenn msg.payload eine Zahl ist → Startsignal
if (typeof msg.payload === "number") {

// Falls bereits ein Vorgang läuft → abbrechen
if (context.get("running")) {
node.warn("Mischvorgang läuft bereits.");
return null;
}

// Zielzyklen speichern
context.set("targetCycles", msg.payload);
context.set("currentCycle", 0);
context.set("direction", "right");
context.set("running", true);

// Timer starten (alle 5 Sekunden)
let timer = setInterval(() => {
mixStep();
}, 5000);

context.set("timer", timer);

// Sofort erste Richtung setzen
return setOutputs();
}


// ------------------------------
// 3) FUNKTION: EINZELNER MISCH-SCHRITT
// ------------------------------
function mixStep() {

let direction = context.get("direction");
let current = context.get("currentCycle");
let target = context.get("targetCycles");

// Richtung wechseln
if (direction === "right") {
context.set("direction", "left");
} else {
context.set("direction", "right");
context.set("currentCycle", current + 1); // Zyklus abgeschlossen
}

// Fortschritt berechnen
let progress = Math.round((context.get("currentCycle") / target) * 100);

// Fortschritt ausgeben
let out = {
progressText: `${context.get("currentCycle")} von ${target} fertig`,
progressValue: progress
};

// Ausgänge setzen
let outputs = setOutputs();
out.merker_q1 = outputs.q1;
out.merker_q2 = outputs.q2;
out.merker_q3 = outputs.q3;

// Prüfen, ob fertig
if (context.get("currentCycle") >= target) {
stopMix();
}

node.send(out);
}


// ------------------------------
// 4) FUNKTION: AUSGÄNGE SETZEN
// ------------------------------
function setOutputs() {

let direction = context.get("direction");
let running = context.get("running");

let q1 = running ? 1 : 0; // Motor EIN
let q2 = (direction === "right" && running) ? 1 : 0;
let q3 = (direction === "left" && running) ? 1 : 0;

return { q1, q2, q3 };
}


// ------------------------------
// 5) FUNKTION: MISCHVORGANG STOPPEN
// ------------------------------
function stopMix() {

clearInterval(context.get("timer"));
context.set("running", false);

// Motor AUS
let out = {
merker_q1: 0,
merker_q2: 0,
merker_q3: 0,
progressText: "Fertig!",
progressValue: 100
};

node.send(out);
}

return null;
     
 
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