diff --git a/Thermo.Active.Core/ThreadsFunctions.cs b/Thermo.Active.Core/ThreadsFunctions.cs
index 62d356fc..8a052366 100644
--- a/Thermo.Active.Core/ThreadsFunctions.cs
+++ b/Thermo.Active.Core/ThreadsFunctions.cs
@@ -917,7 +917,7 @@ public static class ThreadsFunctions
                 recipeRtCounter--;
                 bool onlyRt = recipeRtCounter > 0;
                 //check reset...
-                recipeRtCounter = recipeRtCounter < 0 ? 5 : recipeRtCounter;
+                recipeRtCounter = recipeRtCounter < 0 ? 4 : recipeRtCounter;
 
                 sw.Restart();
 
@@ -1021,7 +1021,7 @@ public static class ThreadsFunctions
                 // Update thread timer
                 UpdateStat(MethodBase.GetCurrentMethod().Name, sw.ElapsedMilliseconds);
                 // Wait
-                Thread.Sleep(CalcSleepTime(1000, (int)sw.ElapsedMilliseconds));
+                Thread.Sleep(CalcSleepTime(500, (int)sw.ElapsedMilliseconds));
             }
         }
         catch (ThreadAbortException)
diff --git a/Thermo.Active.NC/NcAdapter.cs b/Thermo.Active.NC/NcAdapter.cs
index 326538b1..9b2dc9cf 100644
--- a/Thermo.Active.NC/NcAdapter.cs
+++ b/Thermo.Active.NC/NcAdapter.cs
@@ -147,6 +147,11 @@ namespace Thermo.Active.NC
 
         #endregion
 
+        #region cached data
+
+        protected static Dictionary<string, DTORecipeParam> lastRecipe = new Dictionary<string, DTORecipeParam>();
+
+        #endregion
 
         #region Read Data
 
@@ -1266,13 +1271,16 @@ namespace Thermo.Active.NC
             {
                 Dictionary<int, ThermoModels.RecipeParam> currPlcRecipe = new Dictionary<int, ThermoModels.RecipeParam>();
                 CmsError cmsError = NO_ERROR;
-                if (useLastRead)
+                if (useLastRead && lastRecipe.Count > 0)
                 {
-                    cmsError = numericalControl.PLC_RRecipeParamList(false, ref currPlcRecipe);
+                    currentRecipe = lastRecipe;
+                    return cmsError;
                 }
                 else
                 {
                     cmsError = numericalControl.PLC_RRecipeParamList(refreshOnlyRT, ref currPlcRecipe);
+                    if (cmsError.IsError())
+                        return cmsError;
                 }
 
                 if (cmsError.IsError())
@@ -1349,10 +1357,13 @@ namespace Thermo.Active.NC
                     }
                     currentRecipe.Add(item.Label, currParam);
                 }
+                // salvo!
+                lastRecipe = currentRecipe;
             }
             else
             {
                 currentRecipe = new Dictionary<string, DTORecipeParam>();
+                lastRecipe = currentRecipe;
             }
 
             return NO_ERROR;
diff --git a/Thermo.Active/Listeners/SignalR/SignalRListener.cs b/Thermo.Active/Listeners/SignalR/SignalRListener.cs
index dc8e10ba..47204dd3 100644
--- a/Thermo.Active/Listeners/SignalR/SignalRListener.cs
+++ b/Thermo.Active/Listeners/SignalR/SignalRListener.cs
@@ -269,7 +269,8 @@ namespace Thermo.Active.Listeners.SignalR
                     // comparazione
                     if (!item.Value.Equals(LastRecipeFullData[item.Key]))
                     {
-                        diffData[item.Key] = item.Value;
+                        //diffData[item.Key] = item.Value;
+                        diffData.Add(item.Key, item.Value);
                     }
                 }
             }
diff --git a/Thermo.Active/Properties/AssemblyInfo.cs b/Thermo.Active/Properties/AssemblyInfo.cs
index 57ab8036..9accf279 100644
--- a/Thermo.Active/Properties/AssemblyInfo.cs
+++ b/Thermo.Active/Properties/AssemblyInfo.cs
@@ -31,4 +31,4 @@ using System.Runtime.InteropServices;
 //
 // You can specify all the values or you can default the Revision and Build Numbers
 // by using the '*' as shown below:
-[assembly: AssemblyVersion("0.7.5")]
+[assembly: AssemblyVersion("0.8.1")]