diff --git a/pyhon/appliance.py b/pyhon/appliance.py
index d54df40..ce89187 100644
--- a/pyhon/appliance.py
+++ b/pyhon/appliance.py
@@ -13,7 +13,7 @@ if TYPE_CHECKING:
 
 class HonAppliance:
     def __init__(
-        self, api: Optional["HonAPI"], info: Dict[str, Any], zone: int = 0
+            self, api: Optional["HonAPI"], info: Dict[str, Any], zone: int = 0
     ) -> None:
         if attributes := info.get("attributes"):
             info["attributes"] = {v["parName"]: v["parValue"] for v in attributes}
@@ -129,8 +129,8 @@ class HonAppliance:
                 command = self.commands[name]
             for key, data in command.settings.items():
                 if (
-                    not isinstance(data, HonParameterFixed)
-                    and parameters.get(key) is not None
+                        not isinstance(data, HonParameterFixed)
+                        and parameters.get(key) is not None
                 ):
                     with suppress(ValueError):
                         data.value = parameters.get(key)
@@ -175,7 +175,7 @@ class HonAppliance:
     def parameters(self):
         result = {}
         for name, command in self._commands.items():
-            for key, parameter in command.parameters.items():
+            for key, parameter in (command.parameters | command.ancillary_parameters).items():
                 result.setdefault(name, {})[key] = parameter.value
         return result
 
diff --git a/pyhon/commands.py b/pyhon/commands.py
index 03f70d0..33487a3 100644
--- a/pyhon/commands.py
+++ b/pyhon/commands.py
@@ -58,11 +58,8 @@ class HonCommand:
         return self._parameters
 
     @property
-    def ancillary_parameters(self) -> Dict[str, str | float]:
-        return {
-            key: parameter.value
-            for key, parameter in self._ancillary_parameters.items()
-        }
+    def ancillary_parameters(self) -> Dict[str, HonParameter]:
+        return self._ancillary_parameters
 
     async def send(self) -> bool:
         parameters = {
@@ -90,7 +87,9 @@ class HonCommand:
         if command is None:
             command = self
         keys = []
-        for key, parameter in command._parameters.items():
+        for key, parameter in (
+            command._parameters | command._ancillary_parameters
+        ).items():
             if isinstance(parameter, HonParameterFixed):
                 continue
             if key not in keys:
@@ -115,4 +114,5 @@ class HonCommand:
             s: param
             for s in self.setting_keys
             if (param := self._parameters.get(s)) is not None
+            or (param := self._ancillary_parameters.get(s)) is not None
         }
diff --git a/pyhon/helper.py b/pyhon/helper.py
index d126b91..c820dd1 100644
--- a/pyhon/helper.py
+++ b/pyhon/helper.py
@@ -49,7 +49,7 @@ def create_command(commands, concat=False):
     for name, command in commands.items():
         if not concat:
             result[name] = {}
-        for parameter, data in command.parameters.items():
+        for parameter, data in command.settings.items():
             if data.typology == "enum":
                 value = data.values
             elif data.typology == "range":