diff --git a/DentistryHandpieces/MainWindow.xaml b/DentistryHandpieces/MainWindow.xaml
index c739edf..f3f5006 100644
--- a/DentistryHandpieces/MainWindow.xaml
+++ b/DentistryHandpieces/MainWindow.xaml
@@ -871,7 +871,7 @@
                             LostTouchCapture="ManualMotionButton_LostTouchCapture"
                             Margin="8,0,8,0" />
                         <Button Grid.Column="2"
-                            Content="通气阀"
+                            Content="{Binding VentValveButtonText}"
                             Command="{Binding VentValveCommand}"
                             Margin="8,0,8,0" />
                         <Button Grid.Column="3"
diff --git a/DentistryHandpieces/MainWindowViewModel.cs b/DentistryHandpieces/MainWindowViewModel.cs
index b2ec3b9..06e6315 100644
--- a/DentistryHandpieces/MainWindowViewModel.cs
+++ b/DentistryHandpieces/MainWindowViewModel.cs
@@ -41,6 +41,7 @@ public sealed class MainWindowViewModel : ObservableObject
     private const ushort VentValveCoil = 6;
     private const ushort AxialForceModeCoil = 30;
     private const ushort AxialStartCoil = 70;
+    private const ushort AxialDoneCoil = 72;
     private const ushort AxialStopCoil = 73;
     private const ushort SpeedTorqueStartCoil = 80;
     private const ushort SpeedTorqueDoneCoil = 82;
@@ -136,6 +137,8 @@ public sealed class MainWindowViewModel : ObservableObject
 
     private static readonly ushort[] RealtimeCoilAddresses =
     [
+        VentValveCoil,
+        AxialDoneCoil,
         SpeedTorqueDoneCoil,
         SpeedTorqueResetEnabledCoil,
         SpeedTorqueResetDoneCoil,
@@ -203,6 +206,7 @@ public sealed class MainWindowViewModel : ObservableObject
     private bool _isApplyingParameterConfigToInputs;
     private bool _isDisplacementResetting;
     private bool _isSpeedTorqueResetting;
+    private bool _isVentValveOpen;
     private bool _hasShownSpeedTorqueEndWarnings;
     private DateTime _lastParameterReadFailureLogAt = DateTime.MinValue;
     private string _relativeDisplacementText = "0.000 mm";
@@ -238,6 +242,7 @@ public sealed class MainWindowViewModel : ObservableObject
     private string _axialForceSetpointModeButtonText = "轴向跳动力设置";
     private string _displacementResetButtonText = "复位";
     private string _speedTorqueResetButtonText = "复位";
+    private string _ventValveButtonText = "开启通气阀";
 
     public MainWindowViewModel(IPlcCoilService plcCoilService, IPlcRegisterService plcRegisterService, IFileDialogService fileDialogService)
     {
@@ -261,7 +266,7 @@ public sealed class MainWindowViewModel : ObservableObject
         SelectAxialJumpForceSetpointModeCommand = new AsyncRelayCommand(SelectAxialJumpForceSetpointModeAsync);
         ForwardSpeedTorqueCommand = new AsyncRelayCommand(ForwardSpeedTorqueAsync);
         BackwardSpeedTorqueCommand = new AsyncRelayCommand(BackwardSpeedTorqueAsync);
-        VentValveCommand = new AsyncRelayCommand(TriggerVentValveAsync);
+        VentValveCommand = new AsyncRelayCommand(ToggleVentValveAsync);
         StartSpeedTorqueCommand = new AsyncRelayCommand(StartSpeedTorqueAsync);
         StopSpeedTorqueCommand = new AsyncRelayCommand(StopSpeedTorqueAsync);
         ResetSpeedTorqueCommand = new AsyncRelayCommand(ResetSpeedTorqueAsync);
@@ -662,6 +667,12 @@ public sealed class MainWindowViewModel : ObservableObject
         private set => SetProperty(ref _speedTorqueResetButtonText, value);
     }
 
+    public string VentValveButtonText
+    {
+        get => _ventValveButtonText;
+        private set => SetProperty(ref _ventValveButtonText, value);
+    }
+
     private async void RealtimeTimer_Tick(object? sender, EventArgs e)
     {
         if (_isReadingRealtime)
@@ -697,6 +708,7 @@ public sealed class MainWindowViewModel : ObservableObject
             _realtimeSpeed = realtimeSpeed;
             AppendTorqueSample(GetScaledTorque(), DateTime.Now);
             ApplyResetCoilValues(coilValues);
+            UpdateVentValveState(ReadCoilValue(coilValues, VentValveCoil));
             CaptureRealtimeSample(dialIndicator, coilValues);
             FinalizeNoLoadSpeedRunIfDue();
             QueueSnapshotIfDue();
@@ -706,6 +718,11 @@ public sealed class MainWindowViewModel : ObservableObject
                 _maxDisplacement = Math.Max(_maxDisplacement, Math.Abs(_relativeDisplacement));
             }
 
+            if (_isDisplacementRunning && ReadCoilValue(coilValues, AxialDoneCoil))
+            {
+                StopDisplacementTest("状态：已完成");
+            }
+
             if (_isSpeedTorqueRunning && ReadCoilValue(coilValues, SpeedTorqueDoneCoil))
             {
                 await StopSpeedTorqueTestAsync("状态：已完成");
@@ -2040,11 +2057,28 @@ public sealed class MainWindowViewModel : ObservableObject
         await MoveSpeedTorqueDisplacementAsync();
     }
 
-    private async Task TriggerVentValveAsync()
+    private async Task ToggleVentValveAsync()
     {
-        if (await PulsePlcAsync(VentValveCoil, "通气阀"))
+        try
         {
-            StatusText = "通气阀已触发。";
+            IReadOnlyDictionary<ushort, bool> values = await _plcCoilService.ReadCoilValuesAsync(
+                _parameterConfig.ToPlcConnectionConfig(),
+                [VentValveCoil]);
+            bool targetState = !ReadCoilValue(values, VentValveCoil);
+
+            await _plcCoilService.WriteCoilAsync(
+                _parameterConfig.ToPlcConnectionConfig(),
+                VentValveCoil,
+                targetState);
+
+            UpdateVentValveState(targetState);
+            StatusText = targetState ? "通气阀已开启。" : "通气阀已关闭。";
+            Log.Information("PLC常开触点开关成功：通气阀，M{CoilAddress}={Value}", VentValveCoil, targetState ? 1 : 0);
+        }
+        catch (Exception ex)
+        {
+            StatusText = $"PLC 通气阀开关失败：{OperatorMessageFormatter.FromException(ex)}";
+            Log.Error(ex, "PLC常开触点开关失败：通气阀，M{CoilAddress}", VentValveCoil);
         }
     }
 
@@ -2838,6 +2872,12 @@ public sealed class MainWindowViewModel : ObservableObject
         SpeedTorqueResetButtonText = _isSpeedTorqueResetting || enabled ? "复位中" : "复位";
     }
 
+    private void UpdateVentValveState(bool isOpen)
+    {
+        _isVentValveOpen = isOpen;
+        VentValveButtonText = _isVentValveOpen ? "关闭通气阀" : "开启通气阀";
+    }
+
     private static bool ReadCoilValue(IReadOnlyDictionary<ushort, bool> coilValues, ushort address)
     {
         return coilValues.TryGetValue(address, out bool value) && value;