diff --git a/IOB-UT/baseUtils.cs b/IOB-UT/baseUtils.cs
index 9cdd0859..097de556 100644
--- a/IOB-UT/baseUtils.cs
+++ b/IOB-UT/baseUtils.cs
@@ -46,6 +46,14 @@ namespace IOB_UT
 
   public class baseUtils
   {
+    /// <summary>
+    /// Variabile in cui viene salvato lo stato del server MP-IO
+    /// </summary>
+    public static bool MPIO_Online = false;
+    /// <summary>
+    /// Indicazione VETO PING a server sino alla data-ora indicata
+    /// </summary>
+    public static DateTime dtVetoPing = DateTime.Now;
     /// <summary>
     /// Indicazione VETO invio a server sino alla data-ora indicata
     /// </summary>
diff --git a/IOB-WIN/AdapterForm.cs b/IOB-WIN/AdapterForm.cs
index 011fae7c..bd35b0b5 100644
--- a/IOB-WIN/AdapterForm.cs
+++ b/IOB-WIN/AdapterForm.cs
@@ -55,11 +55,11 @@ namespace IOB_WIN
     /// <summary>
     /// Oggetto x gestione dell'adapter GENERICO (x poter usare metodi di ognuno...)
     /// </summary>
-    IobGeneric iobObj;
+    public IobGeneric iobObj;
     /// <summary>
     /// configurazione caricata
     /// </summary>
-    IobConfiguration IOBConf;
+    public IobConfiguration IOBConf;
     /// <summary>
     /// tipo di adapter prescelto...
     /// </summary>
diff --git a/IOB-WIN/DATA/CONF/MAIN.ini b/IOB-WIN/DATA/CONF/MAIN.ini
index 5327409f..58d9bc02 100644
--- a/IOB-WIN/DATA/CONF/MAIN.ini
+++ b/IOB-WIN/DATA/CONF/MAIN.ini
@@ -9,7 +9,6 @@ NAME=master
 ;MPIP=192.168.214.4
 ; Server Steamware
 MPIP=10.74.82.218
-
 MPURL=/MP/IO
 CMDREBO=/IOB/sendRebootGateway?GWIP=
 CMDIOB2CALL=/IOB/getIob2call?GWIP=
diff --git a/IOB-WIN/IobGeneric.cs b/IOB-WIN/IobGeneric.cs
index 937bd013..4bcc5872 100644
--- a/IOB-WIN/IobGeneric.cs
+++ b/IOB-WIN/IobGeneric.cs
@@ -34,7 +34,17 @@ namespace IOB_WIN
     /// <summary>
     /// Indicazione VETO invio a server sino alla data-ora indicata
     /// </summary>
-    public static DateTime dtVetoPing = DateTime.Now;
+    public static DateTime dtVetoPing
+    {
+      get
+      {
+        return utils.dtVetoPing;
+      }
+      set
+      {
+        utils.dtVetoPing = value;
+      }
+    }
     /// <summary>
     /// Indicazione VETO check status IOB x evitare loop troppo stretti...
     /// </summary>
@@ -350,9 +360,19 @@ namespace IOB_WIN
     /// </summary>
     public bool IobOnline;
     /// <summary>
-    /// stato Online/Offline del server MP IO
+    /// stato Online/Offline del server MP IO (su utils condiviso)
     /// </summary>
-    public bool MPOnline;
+    public bool MPOnline
+    {
+      get
+      {
+        return utils.MPIO_Online;
+      }
+      set
+      {
+        utils.MPIO_Online = value;
+      }
+    }
     /// <summary>
     /// Dizionario di VC da trattare come TimeSeries (con conf decodificata + processing successivo...)
     /// </summary>
@@ -2143,8 +2163,7 @@ namespace IOB_WIN
                 {
                   lgInfo("SERVER ONLINE");
                   parentForm.commSrvActive = 1;
-                  dtVetoPing = DateTime.Now.AddMinutes(-5);
-                  utils.dtVetoSend = DateTime.Now.AddMinutes(-5);
+                  dtVetoPing = DateTime.Now.AddMilliseconds(baseUtils.nextPauseSendMSec);
                 }
                 else
                 {
@@ -2154,6 +2173,11 @@ namespace IOB_WIN
                 // salvo nuovo status...
                 MPOnline = answ;
               }
+              else
+              {
+                // allungo periodo controllo...
+                dtVetoPing = DateTime.Now.AddMilliseconds(baseUtils.nextPauseSendMSec * 2);
+              }
             }
             else
             {
@@ -2193,7 +2217,8 @@ namespace IOB_WIN
             try
             {
               // chiamo URL, se restituisce "OK" è enabled!
-              answ = (callUrl(urlIobEnabled, true) == "OK");
+              string callResp = callUrl(urlIobEnabled, false);
+              answ = (callResp == "OK");
               // salvo status...
               IobOnline = answ;
               // se offline imposto veto check a 5 x tempo reinvio...
@@ -2201,6 +2226,11 @@ namespace IOB_WIN
               {
                 dtVetoCheckIOB = DateTime.Now.AddMilliseconds(baseUtils.nextPauseSendMSec * 5);
               }
+              else
+              {
+                // non controllo x meno...
+                dtVetoCheckIOB = DateTime.Now.AddMilliseconds(baseUtils.nextPauseSendMSec * 1);
+              }
             }
             catch
             { }
diff --git a/IOB-WIN/MainForm.cs b/IOB-WIN/MainForm.cs
index 3a37439f..4cc7de20 100644
--- a/IOB-WIN/MainForm.cs
+++ b/IOB-WIN/MainForm.cs
@@ -78,11 +78,12 @@ namespace IOB_WIN
     /// Mostra update delle statistiche di comunicazione (num plc connessi, indirizzo server) con colore ad indicare anomalie...
     /// </summary>
     /// <param name="numPLC"></param>
+    /// <param name="numAttivi"></param>
     /// <param name="serverOk"></param>
-    public void updateComStats(int numPLC, bool serverOk)
+    public void updateComStats(int numPLC, int numAttivi, bool serverOk)
     {
       // testo
-      lblComStats.Text = string.Format("{0} PLC --> {1} (MP/IO)", numPLC, MPIP);
+      lblComStats.Text = $"{numAttivi}/{numPLC} PLC --> {MPIP} (MP/IO)";
       // colore secondo valori... server !="ND" è ok, PLC > 0 è OK
       int score = 0;
       if (serverOk)
@@ -345,7 +346,7 @@ namespace IOB_WIN
         IPAddress.TryParse(ipAdrr, out address);
         try
         {
-          reply = pingSender.Send(address, 100);
+          reply = pingSender.Send(address, 200);
           answ = reply.Status;
         }
         catch (Exception exc)
@@ -424,33 +425,99 @@ namespace IOB_WIN
         lastComCheck = DateTime.Now;
         // conta quanti child form di adapter verso PLC siano aperti !!!FARE!!! chiedere con un metodo che siano ATTIVI e contare quello...
         int numPLC = this.MdiChildren.Count<Form>();
+        int numAttivi = 0;
+        foreach (var item in this.MdiChildren)
+        {
+          try
+          {
+            var currForm = (AdapterForm)item;
+            numAttivi += currForm.iobObj.IobOnline ? 1 : 0;
+          }
+          catch
+          { }
+        }
 
         // update stato!
-        updateComStats(numPLC, testServer);
+        updateComStats(numPLC, numAttivi, testServer);
+      }
+    }
+    /// <summary>
+    /// URL per check alive...
+    /// </summary>
+    public string urlAlive
+    {
+      get
+      {
+        return string.Format(@"http://{0}{1}/IOB", MPIP, MPURL);
       }
     }
     /// <summary>
     /// Verifica il server: esiste IP, risponde a ping, risponde a pagina ALIVE
     /// </summary>
-    protected bool testServer
+    public bool testServer
     {
       get
       {
         bool answ = false;
-        // check server: indirizzo esiste
         if (MPIP != "")
         {
-          IPAddress address = IPAddress.Loopback;
-          // check stato server (SOLO PING!)
-          IPAddress.TryParse(MPIP, out address);
-          if (address != IPAddress.Loopback)
+          if (utils.dtVetoPing < DateTime.Now)
           {
-            answ = utils.pingAddress(address);
+            IPStatus pingStatus = testPingServer;
+            // se passa il ping faccio il resto...
+            if (pingStatus == IPStatus.Success)
+            {
+              try
+              {
+                // chiamo URL, se restituisce "OK" è alive!
+                string callResp = utils.callUrl(urlAlive);
+                answ = (callResp == "OK");
+              }
+              catch (Exception exc)
+              {
+                lgError($"Errore in checkServerAlive:{Environment.NewLine}{exc}");
+              }
+              // verifico SE è variato stato online/offline...
+              if (utils.MPIO_Online != answ)
+              {
+                // se ORA sono online riporto...
+                if (answ)
+                {
+                  lgInfo("SERVER ONLINE");
+                  utils.dtVetoPing = DateTime.Now.AddMilliseconds(baseUtils.nextPauseSendMSec);
+                }
+                else
+                {
+                  lgInfo("SERVER OFFLINE");
+                }
+                // salvo nuovo status...
+                utils.MPIO_Online = answ;
+              }
+              else
+              {
+                // allungo periodo controllo...
+                utils.dtVetoPing = DateTime.Now.AddMilliseconds(baseUtils.nextPauseSendMSec * 2);
+              }
+            }
+            else
+            {
+              lgInfo($"SERVER NOT RESPONDING (PING at {MPIP})");
+              utils.MPIO_Online = false;
+              // imposto veto a 10 volte reinvio dati standard...
+              utils.dtVetoPing = DateTime.Now.AddMilliseconds(baseUtils.nextPauseSendMSec * 10);
+              utils.dtVetoSend = utils.dtVetoPing;
+            }
+          }
+          else
+          {
+            // altrimenti passo ultimo valore noto...
+            answ = utils.MPIO_Online;
           }
         }
         return answ;
       }
     }
+
     #endregion
 
     #region gestione child form
@@ -780,7 +847,6 @@ namespace IOB_WIN
       this.LayoutMdi(MdiLayout.TileHorizontal);
     }
 
-    #endregion
 
     private void minimizeALLToolStripMenuItem_Click(object sender, EventArgs e)
     {
@@ -819,5 +885,7 @@ namespace IOB_WIN
         lgError($"Eccezione in show log (MAIN):{Environment.NewLine}{exc}");
       }
     }
+
+    #endregion
   }
 }
diff --git a/Jenkinsfile b/Jenkinsfile
index f29e4c0f..010dcead 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -16,7 +16,7 @@ pipeline {
 
       /* calcolo numero versione... diverso x branch MASTER/DEVELOP */
       script {
-        withEnv(['NEXT_BUILD_NUMBER=488']) {
+        withEnv(['NEXT_BUILD_NUMBER=489']) {
           // env.versionNumber = VersionNumber(versionNumberString : '2.3.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true)
           env.versionNumber = VersionNumber(versionNumberString : '2.3.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true, overrideBuildsAllTime: '${NEXT_BUILD_NUMBER}')
           env.APP_NAME = 'MAPO-IOB-WIN'