129 lines
4.4 KiB
Python
129 lines
4.4 KiB
Python
import time
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import datetime
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import pyads
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import matplotlib.pyplot as plt
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import matplotlib.dates as mdates
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# ==========================================
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# KONFIGURATION
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# ==========================================
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AMS_NET_ID = "5.17.17.136.1.1"
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PLC_PORT = 851 # Standard SPS-Port in TwinCAT 3
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# SPS-Symbole
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TEMP_SYMBOL = 'MAIN.temperature' # Typ: INT
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BRAKE_SYMBOL = 'MAIN.brakeManualValue' # Typ: BOOL
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LOG_FILENAME = "temperature_and_brake_log_underload.csv"
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READ_INTERVAL = 1.0 # Ausleseintervall in Sekunden
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# ==========================================
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# SETUP LOGDATEI & PLOT
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# ==========================================
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try:
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with open(LOG_FILENAME, 'a', encoding='utf-8') as f:
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if f.tell() == 0:
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f.write("Zeitstempel;Temperatur_C;Bremse_Manuell\n")
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except IOError as e:
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print(f"Fehler beim Erstellen der Log-Datei: {e}")
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# Matplotlib Live-Plot vorbereiten
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plt.ion()
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fig, ax = plt.subplots(figsize=(10, 5))
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timestamps = []
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temp_values = []
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line, = ax.plot([], [], 'r-o', linewidth=2, label="Temperatur (°C)")
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ax.set_title("TwinCAT SPS Überwachung: Temperatur & Bremse")
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ax.set_xlabel("Uhrzeit")
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ax.set_ylabel("Temperatur [°C]")
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ax.grid(True)
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# Textanzeige für den aktuellen Bremsenstatus im Diagramm
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status_text = ax.text(0.98, 0.92, '', transform=ax.transAxes,
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ha='right', va='top', fontsize=11, fontweight='bold',
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bbox=dict(boxstyle='round,pad=0.5', facecolor='white', alpha=0.8))
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ax.legend(loc="upper left")
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ax.xaxis.set_major_formatter(mdates.DateFormatter('%H:%M:%S'))
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fig.autofmt_xdate()
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# ==========================================
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# HAUPTPROGRAMM
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# ==========================================
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def main():
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plc = pyads.Connection(AMS_NET_ID, PLC_PORT)
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try:
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plc.open()
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print(f"Verbindung zu TwinCAT PLC ({AMS_NET_ID}:{PLC_PORT}) erfolgreich hergestellt.")
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print(f"Lese Symbole:\n - '{TEMP_SYMBOL}' (INT)\n - '{BRAKE_SYMBOL}' (BOOL)...")
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print("Schließe das Plot-Fenster oder drücke Strg+C zum Beenden.\n")
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print(f"{'Zeitstempel':<20} | {'Temperatur (°C)':<15} | {'Bremse (0/1)':<15}")
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print("-" * 56)
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while plt.fignum_exists(fig.number):
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loop_start = time.time()
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now = datetime.datetime.now()
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time_str = now.strftime("%Y-%m-%d %H:%M:%S")
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try:
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# 1. Messwerte aus der SPS auslesen
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raw_temp = plc.read_by_name(TEMP_SYMBOL, pyads.PLCTYPE_INT)
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temp_val = float(raw_temp/10.0)
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brake_val = plc.read_by_name(BRAKE_SYMBOL, pyads.PLCTYPE_BOOL)
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brake_int = 1 if brake_val else 0 # Konvertierung Bool zu 0 / 1
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# 2. In Log-Datei schreiben (speichert 0 oder 1)
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with open(LOG_FILENAME, 'a', encoding='utf-8') as f:
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f.write(f"{time_str};{temp_val:.2f};{brake_int}\n")
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# 3. Konsolenausgabe
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print(f"{time_str:<20} | {temp_val:<15.2f} | {brake_int:<15}")
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# 4. Daten für Plot aufbereiten
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timestamps.append(now)
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temp_values.append(temp_val)
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# if len(timestamps) > 60:
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# timestamps.pop(0)
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# temp_values.pop(0)
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# Plot-Daten aktualisieren
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line.set_xdata(timestamps)
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line.set_ydata(temp_values)
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# Status-Anzeige im Plot
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if brake_val:
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status_text.set_text("Bremse: GELÖST (1)")
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status_text.set_color('green')
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else:
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status_text.set_text("Bremse: EINGEFALLEN (0)")
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status_text.set_color('red')
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ax.relim()
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ax.autoscale_view()
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fig.canvas.draw()
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fig.canvas.flush_events()
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except pyads.ADSError as err:
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print(f"[{time_str}] ADS Fehler beim Lesen: {err}")
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elapsed = time.time() - loop_start
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sleep_time = max(0.0, READ_INTERVAL - elapsed)
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time.sleep(sleep_time)
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except KeyboardInterrupt:
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print("\nMessung durch Benutzer abgebrochen.")
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except Exception as e:
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print(f"\nUnerwarteter Fehler: {e}")
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finally:
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plc.close()
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plt.ioff()
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print(f"ADS-Verbindung geschlossen. Daten gespeichert in '{LOG_FILENAME}'.")
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if __name__ == '__main__':
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main() |