diff --git a/CMS_CORE_Library/Models/ThermoModels.cs b/CMS_CORE_Library/Models/ThermoModels.cs
index 84ceae4..01e6639 100644
--- a/CMS_CORE_Library/Models/ThermoModels.cs
+++ b/CMS_CORE_Library/Models/ThermoModels.cs
@@ -817,6 +817,24 @@ namespace CMS_CORE_Library.Models
 
             #endregion Public Methods
         }
+        /// <summary>
+        /// Recipe Parameters
+        /// </summary>
+        public class HistorySheet
+        {
+            #region Public Properties
+
+            public bool newData { get; set; } = false;
+            public double Value1 { get; set; } = 0;
+            public double Value2 { get; set; } = 0;
+            public double Value3 { get; set; } = 0;
+
+            #endregion Public Properties
+
+            #region Public Methods
+
+            #endregion Public Methods
+        }
 
         #endregion Public Classes
     }
diff --git a/CMS_CORE_Library/NcThermo.cs b/CMS_CORE_Library/NcThermo.cs
index fd896a5..3dc0f8d 100644
--- a/CMS_CORE_Library/NcThermo.cs
+++ b/CMS_CORE_Library/NcThermo.cs
@@ -823,6 +823,17 @@ namespace CMS_CORE_Library
         /// <returns></returns>
         public abstract CmsError PLC_RProdCycle(ref ThermoModels.ProdCycleModel currProdCycle);
         /// <summary>
+        /// Get current HistorySheets
+        /// </summary>
+        /// <param name="historySheet"></param>
+        /// <returns></returns>
+        public abstract CmsError PLC_RHistorySheets(ref ThermoModels.HistorySheet historySheet);
+        /// <summary>
+        /// Write ack
+        /// </summary>
+        /// <returns></returns>
+        public abstract CmsError PLC_WAckHistorySheets();
+        /// <summary>
         /// Request for mode selection via strobe
         /// </summary>
         /// <param name="mode">1: MAN, 2: AUTO, 3: SETUP</param>
diff --git a/CMS_CORE_Library/S7Net/Nc_S7Net.cs b/CMS_CORE_Library/S7Net/Nc_S7Net.cs
index 074f315..967dff7 100644
--- a/CMS_CORE_Library/S7Net/Nc_S7Net.cs
+++ b/CMS_CORE_Library/S7Net/Nc_S7Net.cs
@@ -183,6 +183,9 @@ namespace CMS_CORE_Library.S7Net
 
         internal static MEMORY_CELL PROCESS_STATUS = new MEMORY_CELL(MEMORY_TYPE.Siemens_DB, 605, 0, 2);
 
+        internal static MEMORY_CELL HISTORY_SHEETS = new MEMORY_CELL(MEMORY_TYPE.Siemens_DB, 143, 2, 14);
+        internal static MEMORY_CELL HISTORY_ACK_SHEETS = new MEMORY_CELL(MEMORY_TYPE.Siemens_DB, 143, 0, 2);
+
         // Prod strobe/ack
         internal static MEMORY_CELL PROD_ACK = new MEMORY_CELL(MEMORY_TYPE.Siemens_DB, TABLE, 0, 2);
 
@@ -3743,6 +3746,51 @@ namespace CMS_CORE_Library.S7Net
             return NO_ERROR;
         }
 
+
+        /// <summary>
+        /// Get current HistorySheets
+        /// </summary>
+        /// <param name="historySheet"></param>
+        /// <returns></returns>
+        ///
+        public override CmsError PLC_RHistorySheets(ref ThermoModels.HistorySheet historySheet)
+        {
+            List<byte> currMem = new List<byte>();
+            CmsError libraryError = MEM_RWByteList(R, 0, HISTORY_SHEETS.MemType, HISTORY_SHEETS.Address, HISTORY_SHEETS.SubAddress, 0, HISTORY_SHEETS.Size, ref currMem);
+            if (libraryError.IsError())
+                return libraryError;
+
+            // converto!
+            historySheet = new ThermoModels.HistorySheet()
+            {
+                newData = (S7.Net.Types.Int.FromByteArray(currMem.Skip(0).Take(2).ToArray()) & 1) == 1,
+                Value1 = S7.Net.Types.Real.FromByteArray(currMem.Skip(2).Take(4).ToArray()),
+                Value2 = S7.Net.Types.Real.FromByteArray(currMem.Skip(6).Take(4).ToArray()),
+                Value3 = S7.Net.Types.Real.FromByteArray(currMem.Skip(10).Take(4).ToArray()),                
+            };
+
+            return NO_ERROR;
+        }
+
+        /// <summary>
+        /// WriteAck HistorySheets
+        /// </summary>
+        /// <returns></returns>
+        ///
+
+        public override CmsError PLC_WAckHistorySheets()
+        {
+
+            CmsError libraryError = NO_ERROR;
+
+            // Call ack for config request RISK
+            libraryError = PLC_WAck(true,HISTORY_ACK_SHEETS, HISTORY_SHEETS, 1);
+            if (libraryError.IsError())
+                return libraryError;
+
+            return libraryError;
+        }
+
         /// <summary>
         /// read current recipe parameter list
         /// </summary>