diff --git a/src/ATBAPP/DeviceControllerDiag.cpp b/src/ATBAPP/DeviceControllerDiag.cpp
index bc47ec4..1af4ff3 100644
--- a/src/ATBAPP/DeviceControllerDiag.cpp
+++ b/src/ATBAPP/DeviceControllerDiag.cpp
@@ -114,7 +114,7 @@ void DeviceControllerDiag::private_startDiag()
         qCritical() << "DeviceControllerDiag::private_startDiag() interrupted!";
         DCMachineEvent E255Event = DCMachineEvent(DeviceController::State::E255);
         if (!this->previousMachineEventSet.contains(E255Event)) {
-            machineEventSet.insert(E255Event);
+            previousMachineEventSet.insert(E255Event);
             private_sendDiagEvent(E255Event, DeviceController::Action::SET);
         }
         if (this->E255counter > 5) {
@@ -133,7 +133,9 @@ void DeviceControllerDiag::private_startDiag()
              * - diag is called again in ModeOOO wokeup()
              */
         }
-        this->private_finishDiag();
+        this->diagRequestTimeoutTimer->stop();
+        this->isRequestRunning  = false;
+        this->flagInterruptDiag = false;
         return;
     }
 
@@ -177,13 +179,15 @@ void DeviceControllerDiag::sys_superviseSystem()
         // send
         DCMachineEvent E255Event = DCMachineEvent(DeviceController::State::E255);
         if (!this->previousMachineEventSet.contains(E255Event)) {
-            machineEventSet.insert(E255Event);
+            previousMachineEventSet.insert(E255Event);
             private_sendDiagEvent(E255Event, DeviceController::Action::SET);
         }
         if (this->E255counter > 5) { this->restartCArun(); }
                               else { this->E255counter++; }
         QTimer::singleShot(400, this, &DeviceControllerDiag::diagRequest);
-        this->private_finishDiag();
+        this->diagRequestTimeoutTimer->stop();
+        this->isRequestRunning  = false;
+        this->flagInterruptDiag = false;
         return;
     }
 
@@ -194,13 +198,15 @@ void DeviceControllerDiag::sys_superviseSystem()
         hw->dc_autoRequest(true);
 
         DCMachineEvent E255Event = DCMachineEvent(DeviceController::State::M0254);
-        machineEventSet.insert(E255Event);
+        previousMachineEventSet.insert(E255Event);
         private_sendDiagEvent(E255Event, DeviceController::Action::SET);
 
         if (this->E255counter > 5) { this->restartCArun(); }
                               else { this->E255counter++; }
         QTimer::singleShot(400, this, &DeviceControllerDiag::diagRequest);
-        this->private_finishDiag();
+        this->diagRequestTimeoutTimer->stop();
+        this->isRequestRunning  = false;
+        this->flagInterruptDiag = false;
         return;
     }