läuft noch nicht; slave inverter liest in komischen zeitabständen und es gibt wohl bei einigen Registereinträgen probleme
This commit is contained in:
Nils Reiners
234
pv_inverter.py
234
pv_inverter.py
@@ -1,137 +1,155 @@
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import time
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import struct
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import pandas as pd
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from typing import Dict, Any, List, Optional
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# pv_inverter.py
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# -*- coding: utf-8 -*-
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from typing import Optional, Dict, Any, List
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from pymodbus.client import ModbusTcpClient
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EXCEL_PATH = "modbus_registers/pv_inverter_registers.xlsx"
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# Bis EXKLUSIVE 40206 (also max. 40205)
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MAX_ADDR_EXCLUSIVE = 40206
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from pymodbus.exceptions import ModbusIOException
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import struct
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import time
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class PvInverter:
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def __init__(self, device_name: str, ip_address: str, port: int = 502, unit: int = 1):
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"""
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device_name : Anzeigename (z.B. 'master' oder 'slave')
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ip_address : IP des Wechselrichters oder Modbus-Gateways
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port : TCP-Port (Standard 502)
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unit : Modbus Unit-ID (1 = Master, 3 = Slave)
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"""
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"""
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Minimaler Reader für einen SolarEdge-Inverter hinter Modbus-TCP→RTU-Gateway.
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Liest nur die bekannten Register (wie im funktionierenden Skript).
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Kompatibel mit pymodbus 2.5.x und 3.x – kein retry_on_empty.
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"""
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def __init__(
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self,
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device_name: str,
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ip_address: str,
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port: int = 502,
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unit_id: int = 1,
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timeout: float = 1.5,
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silent_interval: float = 0.02,
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):
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self.device_name = device_name
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self.ip = ip_address
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self.host = ip_address
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self.port = port
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self.unit = unit
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self.unit = unit_id
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self.timeout = timeout
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self.silent_interval = silent_interval
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self.client: Optional[ModbusTcpClient] = None
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self.registers: Dict[int, Dict[str, Any]] = {}
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self._connect()
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self.connect_to_modbus()
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self.load_registers(EXCEL_PATH)
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# ---------- Verbindung ----------
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def connect_to_modbus(self):
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self.client = ModbusTcpClient(self.ip, port=self.port, timeout=3.0)
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# ---------------- Verbindung ----------------
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def _connect(self):
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# retries=0: keine internen Mehrfachversuche
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self.client = ModbusTcpClient(self.host, port=self.port, timeout=self.timeout, retries=0)
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if not self.client.connect():
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print(f"❌ Verbindung zu {self.device_name} ({self.ip}:{self.port}) fehlgeschlagen.")
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raise SystemExit(1)
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print(f"✅ Verbindung hergestellt zu {self.device_name} ({self.ip}:{self.port}, unit={self.unit})")
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raise ConnectionError(f"Verbindung zu {self.device_name} ({self.host}:{self.port}) fehlgeschlagen.")
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print(f"✅ Verbindung hergestellt zu {self.device_name} ({self.host}:{self.port}, unit={self.unit})")
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def close(self):
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if self.client:
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self.client.close()
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self.client = None
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# ---------- Register-Liste ----------
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def load_registers(self, excel_path: str):
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xls = pd.ExcelFile(excel_path)
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df = xls.parse()
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# Passe Spaltennamen an deine Excel an
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cols = ["MB Adresse", "Beschreibung", "Variabel Typ"]
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df = df[cols].dropna()
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df["MB Adresse"] = df["MB Adresse"].astype(int)
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# Nur Register unterhalb der Grenze übernehmen
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df = df[df["MB Adresse"] < MAX_ADDR_EXCLUSIVE]
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self.registers = {
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int(row["MB Adresse"]): {
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"desc": str(row["Beschreibung"]).strip(),
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"type": str(row["Variabel Typ"]).strip()
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}
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for _, row in df.iterrows()
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}
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# ---------- Low-Level Lesen ----------
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def _try_read(self, fn_name: str, address: int, count: int) -> Optional[List[int]]:
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"""
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Ruft die pymodbus-Funktion mit fester unit-ID auf (kein Fallback).
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"""
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fn = getattr(self.client, fn_name)
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res = fn(address=address, count=count, slave=self.unit)
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if res is None or (hasattr(res, "isError") and res.isError()):
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# ---------------- Low-Level Lesen ----------------
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def _read_regs(self, addr: int, count: int) -> Optional[List[int]]:
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"""Liest 'count' Holding-Register ab base-0 'addr' für die konfigurierte Unit-ID."""
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try:
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rr = self.client.read_holding_registers(address=addr, count=count, slave=self.unit)
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except ModbusIOException:
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time.sleep(self.silent_interval)
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return None
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except Exception:
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time.sleep(self.silent_interval)
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return None
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return getattr(res, "registers", None)
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def _read_any(self, address: int, count: int) -> Optional[List[int]]:
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regs = self._try_read("read_holding_registers", address, count)
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if regs is None:
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regs = self._try_read("read_input_registers", address, count)
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return regs
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time.sleep(self.silent_interval)
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if not rr or rr.isError():
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return None
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return rr.registers
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# ---------- Decoding ----------
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@staticmethod
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def _to_i16(u16: int) -> int:
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def _to_int16(u16: int) -> int:
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return struct.unpack(">h", struct.pack(">H", u16))[0]
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@staticmethod
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def _to_f32_from_two(u16_hi: int, u16_lo: int, msw_first: bool = True) -> float:
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b = struct.pack(">HH", u16_hi, u16_lo) if msw_first else struct.pack(">HH", u16_lo, u16_hi)
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return struct.unpack(">f", b)[0]
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def _apply_sf(raw: int, sf: int) -> float:
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return raw * (10 ** sf)
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# Wie viele Register braucht der Typ?
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@staticmethod
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def _word_count_for_type(rtype: str) -> int:
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rt = (rtype or "").lower()
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if "uint32" in rt or "real" in rt or "float" in rt or "string(32)" in rt:
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return 2
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return 1
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def _read_string_from_regs(regs: List[int]) -> Optional[str]:
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b = b"".join(struct.pack(">H", r) for r in regs)
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s = b.decode("ascii", errors="ignore").rstrip("\x00 ").strip()
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return s or None
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# ---------- Lesen ----------
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def read_one(self, address_excel: int, rtype: str) -> Optional[float]:
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"""
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Liest einen Wert nach Typ ('INT', 'REAL' etc.) mit fixer Unit-ID.
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"""
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addr = int(address_excel)
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words = self._word_count_for_type(rtype)
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# Grenze prüfen
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if addr + words - 1 >= MAX_ADDR_EXCLUSIVE:
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# ---------------- Hilfsfunktionen ----------------
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def _read_string(self, addr: int, words: int) -> Optional[str]:
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regs = self._read_regs(addr, words)
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if regs is None:
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return None
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return self._read_string_from_regs(regs)
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if words == 2:
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regs = self._read_any(addr, 2)
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if not regs or len(regs) < 2:
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return None
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return self._to_f32_from_two(regs[0], regs[1])
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else:
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regs = self._read_any(addr, 1)
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if not regs:
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return None
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return float(self._to_i16(regs[0]))
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def _read_scaled(self, value_addr: int, sf_addr: int) -> Optional[float]:
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regs = self._read_regs(value_addr, 1)
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sf = self._read_regs(sf_addr, 1)
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if regs is None or sf is None:
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return None
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raw = self._to_int16(regs[0])
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sff = self._to_int16(sf[0])
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return self._apply_sf(raw, sff)
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def _read_u32_with_sf(self, value_addr: int, sf_addr: int) -> Optional[float]:
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regs = self._read_regs(value_addr, 2)
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sf = self._read_regs(sf_addr, 1)
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if regs is None or sf is None:
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return None
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u32 = (regs[0] << 16) | regs[1]
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sff = self._to_int16(sf[0])
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return self._apply_sf(u32, sff)
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# ---------------- Öffentliche API ----------------
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def get_state(self) -> Dict[str, Any]:
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"""
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Liest alle gültigen Register und gibt ein dict zurück.
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"""
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data = {"Zeit": time.strftime("%Y-%m-%d %H:%M:%S")}
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for address, meta in sorted(self.registers.items()):
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words = self._word_count_for_type(meta["type"])
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if address + words - 1 >= MAX_ADDR_EXCLUSIVE:
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continue
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val = self.read_one(address, meta["type"])
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if val is None:
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continue
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key = f"{address} - {meta['desc']}"
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data[key] = val
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return data
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"""Liest exakt die bekannten Register und gibt ein Dict zurück."""
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state: Dict[str, Any] = {}
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# --- Common Block ---
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state["C_Manufacturer"] = self._read_string(40004, 16)
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state["C_Model"] = self._read_string(40020, 16)
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state["C_Version"] = self._read_string(40044, 8)
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state["C_SerialNumber"] = self._read_string(40052, 16)
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# --- Inverter Block ---
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state["I_AC_Power_W"] = self._read_scaled(40083, 40084)
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state["I_AC_Voltage_V"] = self._read_scaled(40079, 40082)
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state["I_AC_Frequency_Hz"] = self._read_scaled(40085, 40086)
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state["I_DC_Power_W"] = self._read_scaled(40100, 40101)
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state["I_AC_Energy_Wh_total"] = self._read_u32_with_sf(40093, 40095)
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status_regs = self._read_regs(40107, 2)
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if status_regs:
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state["I_Status"] = status_regs[0]
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state["I_Status_Vendor"] = status_regs[1]
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else:
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state["I_Status"] = None
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state["I_Status_Vendor"] = None
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return state
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# ---------------- Beispiel ----------------
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if __name__ == "__main__":
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MODBUS_IP = "192.168.1.112"
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MODBUS_PORT = 502
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master = PvInverter("solaredge_master", MODBUS_IP, port=MODBUS_PORT, unit_id=1)
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slave = PvInverter("solaredge_slave", MODBUS_IP, port=MODBUS_PORT, unit_id=3)
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try:
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sm = master.get_state()
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ss = slave.get_state()
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print("\n=== MASTER ===")
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for k, v in sm.items():
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print(f"{k:22s}: {v}")
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print("\n=== SLAVE ===")
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for k, v in ss.items():
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print(f"{k:22s}: {v}")
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finally:
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master.close()
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slave.close()
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