diff --git a/pyhon/appliance.py b/pyhon/appliance.py
index bfb16b2..76514ff 100644
--- a/pyhon/appliance.py
+++ b/pyhon/appliance.py
@@ -330,7 +330,7 @@ class HonAppliance:
         command: HonCommand = self.commands.get(command_name)
         for key, value in self.attributes.get("parameters", {}).items():
             if isinstance(value, str) and (new := command.parameters.get(key)):
-                self.attributes["parameters"][key].value = str(new.intern_value)
+                self.attributes["parameters"][key].update(str(new.intern_value), shield=True)
 
     def sync_command(self, main, target=None) -> None:
         base: HonCommand = self.commands.get(main)
diff --git a/pyhon/attributes.py b/pyhon/attributes.py
index 3a45c29..55ec0b7 100644
--- a/pyhon/attributes.py
+++ b/pyhon/attributes.py
@@ -1,17 +1,21 @@
-from datetime import datetime
-from typing import Optional
+from datetime import datetime, timedelta
+from typing import Optional, Final, Dict
 
 from pyhon.helper import str_to_float
 
 
 class HonAttribute:
+    _LOCK_TIMEOUT: Final = 10
+
     def __init__(self, data):
         self._value: str = ""
         self._last_update: Optional[datetime] = None
+        self._lock_timestamp: Optional[datetime] = None
         self.update(data)
 
     @property
     def value(self) -> float | str:
+        """Attribute value"""
         try:
             return str_to_float(self._value)
         except ValueError:
@@ -23,15 +27,32 @@ class HonAttribute:
 
     @property
     def last_update(self) -> Optional[datetime]:
+        """Timestamp of last api update"""
         return self._last_update
 
-    def update(self, data):
-        self._value = data.get("parNewVal", "")
+    @property
+    def lock(self) -> bool:
+        """Shows if value changes are forbidden"""
+        if not self._lock_timestamp:
+            return False
+        lock_until = self._lock_timestamp + timedelta(seconds=self._LOCK_TIMEOUT)
+        return lock_until >= datetime.utcnow()
+
+    def update(self, data: Dict[str, str] | str, shield: bool = False) -> bool:
+        if self.lock and not shield:
+            return False
+        if shield:
+            self._lock_timestamp = datetime.utcnow()
+        if isinstance(data, str):
+            self.value = data
+            return True
+        self.value = data.get("parNewVal", "")
         if last_update := data.get("lastUpdate"):
             try:
                 self._last_update = datetime.fromisoformat(last_update)
             except ValueError:
                 self._last_update = None
+        return True
 
     def __str__(self) -> str:
         return self._value