wechselrichter zum tesent eingebunden

test_wr.py

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+from pymodbus.client import ModbusTcpClient
+import struct
+import sys
+from typing import Optional
+
+# === Verbindungseinstellungen ===
+MODBUS_IP   = "192.168.1.107"
+MODBUS_PORT = 502  # SetApp: 1502; LCD-Menü: 502 -> ggf. anpassen
+UNIT_ID     = 1     # Default laut Doku: 1
+
+client = ModbusTcpClient(MODBUS_IP, port=MODBUS_PORT)
+if not client.connect():
+    print("Verbindung fehlgeschlagen.")
+    sys.exit(1)
+
+def read_regs(addr: int, count: int):
+    """Hilfsfunktion: liest 'count' Holding-Register ab base-0 'addr'."""
+    rr = client.read_holding_registers(address=addr, count=count)
+    if rr.isError():
+        return None
+    return rr.registers
+
+def read_string(addr: int, words: int) -> Optional[str]:
+    """
+    SunSpec-Strings: ASCII, Big-Endian, 2 Bytes pro Register, 0x00 gepadded.
+    """
+    regs = read_regs(addr, words)
+    if regs is None:
+        return None
+    b = b"".join(struct.pack(">H", r) for r in regs)
+    # SunSpec Strings sind meist mit \x00 und Spaces gepadded:
+    s = b.decode("ascii", errors="ignore").rstrip("\x00 ").strip()
+    return s or None
+
+def to_int16(u16: int) -> int:
+    """unsigned 16 -> signed 16"""
+    return struct.unpack(">h", struct.pack(">H", u16))[0]
+
+def apply_sf(raw: int, sf: int) -> float:
+    return raw * (10 ** sf)
+
+def read_scaled(value_addr: int, sf_addr: int) -> Optional[float]:
+    regs = read_regs(value_addr, 1)
+    sf   = read_regs(sf_addr, 1)
+    if regs is None or sf is None:
+        return None
+    raw  = to_int16(regs[0])
+    sff  = to_int16(sf[0])
+    return apply_sf(raw, sff)
+
+def read_u32_with_sf(value_addr: int, sf_addr: int) -> Optional[float]:
+    """
+    Liest 32-bit Zähler (acc32, Big-Endian, 2 Register) + SF.
+    """
+    regs = read_regs(value_addr, 2)
+    sf   = read_regs(sf_addr, 1)
+    if regs is None or sf is None:
+        return None
+    # Big-Endian zusammenbauen:
+    u32 = (regs[0] << 16) | regs[1]
+    sff = to_int16(sf[0])
+    return apply_sf(u32, sff)
+
+# ==== Common Block (base-0) ====
+manufacturer = read_string(40004, 16)  # C_Manufacturer
+model        = read_string(40020, 16)  # C_Model
+version      = read_string(40044, 8)   # C_Version
+serial       = read_string(40052, 16)  # C_SerialNumber
+
+print(f"Hersteller:     {manufacturer}")
+print(f"Modell:         {model}")
+print(f"Version:        {version}")
+print(f"Seriennummer:   {serial}")
+
+# ==== Inverter Block (base-0) ====
+# AC Power + Scale Factor
+ac_power = read_scaled(40083, 40084)  # I_AC_Power, I_AC_Power_SF
+if ac_power is not None:
+    print(f"AC Power:       {ac_power} W")
+else:
+    print("Fehler beim Lesen von AC Power")
+
+# AC Spannung L-N Durchschnitt (falls 1ph/3ph mit N verfügbar) + SF
+ac_voltage = read_scaled(40079, 40082)  # I_AC_VoltageAN, I_AC_Voltage_SF
+if ac_voltage is not None:
+    print(f"AC Spannung:    {ac_voltage} V")
+
+# AC Frequenz + SF
+ac_freq = read_scaled(40085, 40086)  # I_AC_Frequency, _SF
+if ac_freq is not None:
+    print(f"Frequenz:       {ac_freq} Hz")
+
+# DC Power + SF
+dc_power = read_scaled(40100, 40101)  # I_DC_Power, _SF
+if dc_power is not None:
+    print(f"DC Power:       {dc_power} W")
+
+# Lifetime Energy (AC_Energy_WH, acc32) + SF
+lifetime_wh = read_u32_with_sf(40093, 40095)  # I_AC_Energy_WH, _SF
+if lifetime_wh is not None:
+    print(f"Lifetime Energy: {lifetime_wh} Wh")
+
+# Status
+status_regs = read_regs(40107, 2)  # I_Status, I_Status_Vendor
+if status_regs:
+    i_status        = status_regs[0]
+    i_status_vendor = status_regs[1]
+    print(f"Status:         {i_status} (Vendor: {i_status_vendor})")
+
+client.close()