diff --git a/IOB-MAN/IOBManPanel.cs b/IOB-MAN/IOBManPanel.cs
index 0caf6a62..34f9281d 100644
--- a/IOB-MAN/IOBManPanel.cs
+++ b/IOB-MAN/IOBManPanel.cs
@@ -980,16 +980,29 @@ namespace IOB_MAN
           }
         }
       }
-      else if (this.dgvManagedItems.Columns[e.ColumnIndex].Name == "plcOk")
+      else if (this.dgvManagedItems.Columns[e.ColumnIndex].Name == "lastPlcRead")
       {
         if (e.Value != null)
         {
-          bool isOk = false;
-          bool.TryParse(e.Value.ToString(), out isOk);
-          if (!isOk)
+          DateTime adesso = DateTime.Now;
+          DateTime lastRead = adesso.AddMinutes(-60);
+          DateTime.TryParse(e.Value.ToString(), out lastRead);
+          if (Math.Abs(adesso.Subtract(lastRead).TotalSeconds) > 180)
           {
             e.CellStyle.BackColor = Color.Red;
           }
+          else if (Math.Abs(adesso.Subtract(lastRead).TotalSeconds) > 120)
+          {
+            e.CellStyle.BackColor = Color.OrangeRed;
+          }
+          else if (Math.Abs(adesso.Subtract(lastRead).TotalSeconds) > 60)
+          {
+            e.CellStyle.BackColor = Color.Yellow;
+          }
+          else if (Math.Abs(adesso.Subtract(lastRead).TotalSeconds) > 15)
+          {
+            e.CellStyle.BackColor = Color.YellowGreen;
+          }
           else
           {
             e.CellStyle.BackColor = Color.White;
diff --git a/IOB-MAN/iobAdapt.cs b/IOB-MAN/iobAdapt.cs
index f8f95c6b..3ecb2b9f 100644
--- a/IOB-MAN/iobAdapt.cs
+++ b/IOB-MAN/iobAdapt.cs
@@ -88,19 +88,6 @@ namespace IOB_MAN
       }
     }
     /// <summary>
-    /// Determina se sia OK la comunicazione con il PLC, cioè non sia FERMO nella comunicazione per > 5 minuti
-    /// </summary>
-    [DisplayName("PlcOk")]
-    public bool plcOk
-    {
-      get
-      {
-        DateTime adesso = DateTime.Now;
-        bool plcOnline = Math.Abs(adesso.Subtract(currIobStatus.lastDataIn).TotalSeconds) < 300;
-        return plcOnline;
-      }
-    }
-    /// <summary>
     /// Counter dell'IOB
     /// </summary>
     [DisplayName("pz.IOB")]
@@ -144,6 +131,31 @@ namespace IOB_MAN
         return currIobStatus.queueFlLen;
       }
     }
+    /// <summary>
+    /// Ultima data-ora di comunicazione calida con PLC
+    /// </summary>
+    [DisplayName("Last PLC read")]
+    public DateTime lastPlcRead
+    {
+      get
+
+      {
+        return currIobStatus.lastDataIn;
+      }
+    }
+    /// <summary>
+    /// Determina se sia OK la comunicazione con il PLC, cioè non sia FERMO nella comunicazione per > 5 minuti
+    /// </summary>
+    [DisplayName("PlcOk")]
+    public bool plcOk
+    {
+      get
+      {
+        DateTime adesso = DateTime.Now;
+        bool plcOnline = Math.Abs(adesso.Subtract(currIobStatus.lastDataIn).TotalSeconds) < 300;
+        return plcOnline;
+      }
+    }
   }
 
 }
diff --git a/Jenkinsfile b/Jenkinsfile
index 64ffcc81..adb1fe3f 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -9,7 +9,7 @@ pipeline {
       steps {
       /* calcolo numero versione... diverso x branch MASTER/DEVELOP */
       script {
-        withEnv(['NEXT_BUILD_NUMBER=686']) {
+        withEnv(['NEXT_BUILD_NUMBER=687']) {
           // env.versionNumber = VersionNumber(versionNumberString : '3.0.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true)
           env.versionNumber = VersionNumber(versionNumberString : '3.0.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true, overrideBuildsAllTime: '${NEXT_BUILD_NUMBER}')
           env.APP_NAME = 'MAPO-IOB-WIN'