diff --git a/MTC_Adapter/MTC_Adapter/AdapterESA.cs b/MTC_Adapter/MTC_Adapter/AdapterESA.cs
index f896ffa..85e2f32 100644
--- a/MTC_Adapter/MTC_Adapter/AdapterESA.cs
+++ b/MTC_Adapter/MTC_Adapter/AdapterESA.cs
@@ -245,9 +245,11 @@ namespace MTC_Adapter
             if (utils.CRB("verbose")) lg.Info("step 01: impostato INI File {0}", iniPath);
 
             loadOtherFile();
-
+            
+            parentForm.commPlcActive = true;
             //ncDevice = new thdNcEsaGvKvara(EsaIni, mapIOT_Byte.Length, mapIOT_Word.Length, mapIOT_DWord.Length, 255); // impostato a 255 byte (char) FISSO x la parte stringa... mapIOT_String.Length);
             ncDevice = new thdNcEsaGvKvara(EsaIni, numByte, numWord, numDWord, numString); // impostato a 255 byte (char) FISSO x la parte stringa... mapIOT_String.Length);
+            parentForm.commPlcActive = false;
 
             if (utils.CRB("verbose")) lg.Info("step 02: avviato thdNcEsaGvKvara da INI File {0}", iniPath);
 
@@ -315,9 +317,11 @@ namespace MTC_Adapter
             if (connectionOk)
             {
                 // leggo TUTTO il blocco di memoria
+                parentForm.commPlcActive = true;
                 inizio = DateTime.Now;
                 ncDevice.ReadBufferByte();
                 if (utils.CRB("recTime")) TimingData.addResult(string.Format("R{0}-PLC_IOT-Byte", ncDevice.PLC_MemoryAreaIOT_Byte.Length), DateTime.Now.Subtract(inizio).Ticks);
+                parentForm.commPlcActive = false;
             }
             else
             {
@@ -582,9 +586,11 @@ namespace MTC_Adapter
             if (connectionOk)
             {
                 // leggo TUTTO il blocco di memoria
+                parentForm.commPlcActive = true;
                 inizio = DateTime.Now;
                 ncDevice.ReadBufferWord();
                 if (utils.CRB("recTime")) TimingData.addResult(string.Format("R{0}-PLC_IOT-Word", ncDevice.PLC_MemoryAreaIOT_Word.Length), DateTime.Now.Subtract(inizio).Ticks);
+                parentForm.commPlcActive = false;
             }
             else
             {
@@ -779,9 +785,11 @@ namespace MTC_Adapter
             if (connectionOk)
             {
                 // leggo TUTTO il blocco di memoria
+                parentForm.commPlcActive = true;
                 inizio = DateTime.Now;
                 ncDevice.ReadBufferDWord();
                 if (utils.CRB("recTime")) TimingData.addResult(string.Format("R{0}-PLC_IOT-DWord", ncDevice.PLC_MemoryAreaIOT_DWord.Length), DateTime.Now.Subtract(inizio).Ticks);
+                parentForm.commPlcActive = false;
             }
             else
             {
@@ -942,9 +950,11 @@ namespace MTC_Adapter
             if (connectionOk)
             {
                 // leggo TUTTO il blocco di memoria
+                parentForm.commPlcActive = true;
                 inizio = DateTime.Now;
                 ncDevice.ReadBufferString();
                 if (utils.CRB("recTime")) TimingData.addResult(string.Format("R{0}-PLC_IOT-DWord", ncDevice.PLC_MemoryAreaIOT_DWord.Length), DateTime.Now.Subtract(inizio).Ticks);
+                parentForm.commPlcActive = false;
             }
             else
             {
diff --git a/MTC_Adapter/MTC_Adapter/AdapterFanuc.cs b/MTC_Adapter/MTC_Adapter/AdapterFanuc.cs
index deecc84..7d4ca93 100644
--- a/MTC_Adapter/MTC_Adapter/AdapterFanuc.cs
+++ b/MTC_Adapter/MTC_Adapter/AdapterFanuc.cs
@@ -30,11 +30,13 @@ namespace MTC_Adapter
             {
                 try
                 {
+                    parentForm.commPlcActive = true;
                     answ = FANUC_ref.F_RW_Byte(bWrite, MemType, memIndex, ref Value);
                 }
                 catch
                 { }
             }
+            parentForm.commPlcActive = false;
             return answ;
         }
         /// <summary>
@@ -52,11 +54,13 @@ namespace MTC_Adapter
             {
                 try
                 {
+                    parentForm.commPlcActive = true;
                     answ = FANUC_ref.F_RW_Byte(bWrite, MemType, memIndex, ref Value);
                 }
                 catch
                 { }
             }
+            parentForm.commPlcActive = false;
             return answ;
         }
 
@@ -79,7 +83,9 @@ namespace MTC_Adapter
         {
             lg.Info("Start init Adapter FANUC all'IP {0}", utils.CRS("ipPLC"));
 
+            parentForm.commPlcActive = true;
             Runtime.CreateNC(CNC.NcType.FANUC, utils.CRS("ipPLC"));
+            parentForm.commPlcActive = false;
 
             // inizializzo posizioni assi...
             prevPosAxis = new double[adpConf.nAxis];
@@ -130,7 +136,9 @@ namespace MTC_Adapter
                 string szStatusConnection = "";
                 try
                 {
+                    parentForm.commPlcActive = true;
                     FANUC_ref.Connect(ref szStatusConnection);
+                    parentForm.commPlcActive = false;
                     lg.Info("szStatusConnection: " + szStatusConnection);
                     connectionOk = true;
                     // refresh stato allarmi!!!
@@ -770,9 +778,11 @@ namespace MTC_Adapter
             sb1.AppendLine(string.Format("POWER {0}: | EmStop:{1:N3} | ProcSel: {2}", mPower.Value, mEStop.Value, mProcSel.Value));
 
             // leggo dati globali...
+            parentForm.commPlcActive = true;
             inizio = DateTime.Now;
             allDynData = FANUC_ref.getAllDynData();
             if (utils.CRB("recTime")) TimingData.addResult("R-ALL-DYN-DATA", DateTime.Now.Subtract(inizio).Ticks);
+            parentForm.commPlcActive = false;
 
             FeedRate = allDynData.actf;
 
@@ -798,9 +808,11 @@ namespace MTC_Adapter
             {
                 sb1.AppendLine(string.Format("Allarmi CNC: {0}", allDynData.alarm));
 
+                parentForm.commPlcActive = true;
                 inizio = DateTime.Now;
                 allarmiCNC = FANUC_ref.getCncAlarm();
                 if (utils.CRB("recTime")) TimingData.addResult("R-CNC-ALARMS", DateTime.Now.Subtract(inizio).Ticks);
+                parentForm.commPlcActive = false;
                 checkCNCAlarms();
             }
             else
@@ -1000,9 +1012,11 @@ namespace MTC_Adapter
             base.getPath();
 
             // recupero vettore generale G MODE
+            parentForm.commPlcActive = true;
             inizio = DateTime.Now;
             CMSCncLib.Focas1.ODBGCD vettGCodes = FANUC_ref.getPathGCodeMod();
             if (utils.CRB("recTime")) TimingData.addResult("R-GCodModal", DateTime.Now.Subtract(inizio).Ticks);
+            parentForm.commPlcActive = false;
 
             string GCodAttivi = "";
             GCodAttivi += string.Format("[{0}]", vettGCodes.gcd0.code);
@@ -1034,17 +1048,21 @@ namespace MTC_Adapter
             GCodAttivi += string.Format("[{0}]", vettGCodes.gcd26.code);
             GCodAttivi += string.Format("[{0}]", vettGCodes.gcd27.code);
 
+            parentForm.commPlcActive = true;
             inizio = DateTime.Now;
             vettGCodes = FANUC_ref.getPathGCode1Shot();
+            parentForm.commPlcActive = false;
             if (utils.CRB("recTime")) TimingData.addResult("R-GCodOneShot", DateTime.Now.Subtract(inizio).Ticks);
             if (vettGCodes.gcd0.flag > 0) GCodAttivi += string.Format("[{0}]", vettGCodes.gcd0.code);
             if (vettGCodes.gcd1.flag > 0) GCodAttivi += string.Format("[{0}]", vettGCodes.gcd1.code);
             if (vettGCodes.gcd2.flag > 0) GCodAttivi += string.Format("[{0}]", vettGCodes.gcd2.code);
             if (vettGCodes.gcd3.flag > 0) GCodAttivi += string.Format("[{0}]", vettGCodes.gcd3.code);
 
+            parentForm.commPlcActive = true;
             inizio = DateTime.Now;
             CMSCncLib.Focas1.ODB5AXMAN vettTTCoord = FANUC_ref.getPathTTCoord();
             if (utils.CRB("recTime")) TimingData.addResult("R-TTCoord", DateTime.Now.Subtract(inizio).Ticks);
+            parentForm.commPlcActive = false;
 
             // ciclo su path
             StringBuilder sb_2;
@@ -1088,6 +1106,7 @@ namespace MTC_Adapter
             // mostro assi in DataMonitor......
             StringBuilder sb = new StringBuilder();
 
+            parentForm.commPlcActive = true;
             inizio = DateTime.Now;
             CMSCncLib.Focas1.ODBPOS posAssi = FANUC_ref.getAllAxisPos();
             if (utils.CRB("recTime")) TimingData.addResult("R-AXIS_POS", DateTime.Now.Subtract(inizio).Ticks);
@@ -1095,6 +1114,7 @@ namespace MTC_Adapter
             inizio = DateTime.Now;
             CMSCncLib.Focas1.ODBSVLOAD loadAssi = FANUC_ref.getAllAxisLoad();
             if (utils.CRB("recTime")) TimingData.addResult("R-AXIS_LOAD", DateTime.Now.Subtract(inizio).Ticks);
+            parentForm.commPlcActive = false;
 
             CMSCncLib.Focas1.LOADELM valLoad = new CMSCncLib.Focas1.LOADELM();
             CMSCncLib.Focas1.POSELMALL valPos = new CMSCncLib.Focas1.POSELMALL();