diff --git a/luxtronik/definitions/__init__.py b/luxtronik/definitions/__init__.py
index a4672160..9afa9318 100644
--- a/luxtronik/definitions/__init__.py
+++ b/luxtronik/definitions/__init__.py
@@ -39,6 +39,8 @@ class LuxtronikDefinition:
         "since": "",
         "until": "",
         "datatype": "",
+        "bit_offset": None,
+        "bit_count": None,
         "description": "",
     }
 
@@ -91,8 +93,13 @@ def __init__(self, data_dict, type_name, offset):
             data_type_valid = self._data_type in self.VALID_DATA_TYPES
             self._valid &= data_type_valid
             data_type_valid &= self._data_type != ""
-            self._num_bits = int(self._data_type.replace('U', '').replace('INT', '')) \
-                if data_type_valid else 0
+            self._bit_offset = data_dict["bit_offset"]
+            bit_count = data_dict["bit_count"]
+            if bit_count:
+                self._num_bits = bit_count
+            else:
+                self._num_bits = int(self._data_type.replace('U', '').replace('INT', '')) \
+                    if data_type_valid else 0
         except Exception as e:
             self._valid = False
             self._index = 0
@@ -164,6 +171,10 @@ def writeable(self):
     def data_type(self):
         return self._data_type
 
+    @property
+    def bit_offset(self):
+        return self._bit_offset
+
     @property
     def num_bits(self):
         return self._num_bits
@@ -238,7 +249,7 @@ def __getitem__(self, name_or_idx):
 
     def __contains__(self, def_name_or_idx):
         if isinstance(def_name_or_idx, LuxtronikDefinition):
-            return any(def_name_or_idx is d for d in self._index_dict.values())
+            return any(def_name_or_idx is d for d in self._name_dict.values())
         return self._get(def_name_or_idx) is not None
 
     def _add_alias(self, definition, alias):
diff --git a/luxtronik/definitions/inputs.py b/luxtronik/definitions/inputs.py
index c266f528..954c8e55 100644
--- a/luxtronik/definitions/inputs.py
+++ b/luxtronik/definitions/inputs.py
@@ -15,6 +15,7 @@
 from typing import Final
 
 from luxtronik.datatypes import (
+    Bool,
     BufferType,
     CelsiusInt16,
     CelsiusUInt16,
@@ -36,6 +37,71 @@
 INPUTS_DEFAULT_DATA_TYPE: Final = 'INT16'
 
 INPUTS_DEFINITIONS_LIST: Final = [
+    {
+        "index": 0,
+        "count": 1,
+        "names": ["heatpump_vd1_status"],
+        "type": Bool,
+        "writeable": False,
+        "datatype": "UINT16",
+        "bit_offset": 0,
+        "bit_count": 1,
+        "unit": "boolean",
+        "since": "3.90.1",
+        "description": "Indicates whether VD1 is running"
+    },
+    {
+        "index": 0,
+        "count": 1,
+        "names": ["heatpump_vd2_status"],
+        "type": Bool,
+        "writeable": False,
+        "datatype": "UINT16",
+        "bit_offset": 1,
+        "bit_count": 1,
+        "unit": "boolean",
+        "since": "3.90.1",
+        "description": "Indicates whether VD2 is running"
+    },
+    {
+        "index": 0,
+        "count": 1,
+        "names": ["heatpump_zwe1_status"],
+        "type": Bool,
+        "writeable": False,
+        "datatype": "UINT16",
+        "bit_offset": 2,
+        "bit_count": 1,
+        "unit": "boolean",
+        "since": "3.90.1",
+        "description": "Indicates whether ZWE1 is running"
+    },
+    {
+        "index": 0,
+        "count": 1,
+        "names": ["heatpump_zwe2_status"],
+        "type": Bool,
+        "writeable": False,
+        "datatype": "UINT16",
+        "bit_offset": 3,
+        "bit_count": 1,
+        "unit": "boolean",
+        "since": "3.90.1",
+        "description": "Indicates whether ZWE2 is running"
+    },
+    {
+        "index": 0,
+        "count": 1,
+        "names": ["heatpump_zwe3_status"],
+        "type": Bool,
+        "writeable": False,
+        "datatype": "UINT16",
+        "bit_offset": 4,
+        "bit_count": 1,
+        "unit": "boolean",
+        "since": "3.90.1",
+        "description": "Indicates whether ZWE3 is running"
+    },
     {
         "index": 0,
         "count": 1,