2015-09-15 update 1 fix a bug that cause program not work when it running for at least one week

Modbus.Net/ModBus.Net/TaskManager.cs

@@ -377,7 +377,16 @@ namespace ModBus.Net
             }
             foreach (var machine in saveMachines)
             {
-                await RunTask(machine);
+                try
+                {
+                    CancellationTokenSource cts = new CancellationTokenSource();
+                    cts.CancelAfter(TimeSpan.FromSeconds(30));
+                    await RunTask(machine).WithCancellation(cts.Token);
+                }
+                catch
+                {
+                    return;
+                }
             }
         }