diff --git a/Services/PlcSimulator.cs b/Services/PlcSimulator.cs
index c870b4d..7d4360c 100644
--- a/Services/PlcSimulator.cs
+++ b/Services/PlcSimulator.cs
@@ -19,6 +19,7 @@ namespace TabletTester2025.Services
             {
                 72 => 40 + (float)_rand.NextDouble() * 20,    // 硬度最大采集力
                 100 => 40 + (float)_rand.NextDouble() * 20,   // 硬度 40~60N
+                82 => _rand.Next(0, 101),                       // 脆碎实时圈数
                 410 => 100f,                                   // 脆碎圈数
                 412 => 5.0f + (float)_rand.NextDouble() * 2,  // 脆碎度前重
                 414 => 4.9f + (float)_rand.NextDouble() * 2,  // 后重
@@ -41,7 +42,6 @@ namespace TabletTester2025.Services
         {
             int value = startAddress switch
             {
-                82 => _rand.Next(0, 101), // 脆碎实时圈数
                 410 => 100, // 脆碎圈数
                 430 => 30,  // 溶出1时间(min)
                 440 => 30,  // 溶出2时间(min)
diff --git a/ViewModels/StationViewModel.cs b/ViewModels/StationViewModel.cs
index d11e456..ef25fc5 100644
--- a/ViewModels/StationViewModel.cs
+++ b/ViewModels/StationViewModel.cs
@@ -149,7 +149,7 @@ namespace TabletTester2025.ViewModels
         [ObservableProperty] private bool _friabilityClockwise = true;
         [ObservableProperty] private bool _friabilityCounterClockwise;
         [ObservableProperty] private double _friabilityCurrentRpm;
-        [ObservableProperty] private int _friabilityRealtimeRounds;
+        [ObservableProperty] private double _friabilityRealtimeRounds;
         [ObservableProperty] private int _friabilityRemainingRounds = 100;
         public IAsyncRelayCommand StopHardnessCommand { get; }
         public IAsyncRelayCommand StopFriabilityCommand { get; }
@@ -1885,36 +1885,35 @@ namespace TabletTester2025.ViewModels
                     throw new InvalidOperationException("脆碎前重量必须大于0");
 
                 double rpm = FriabilityTargetRpm > 0 ? FriabilityTargetRpm : 25;
-                double testTimeMin = FriabilityTargetTimeMin > 0 ? FriabilityTargetTimeMin : 4;
                 int totalRounds = Math.Max(1, FriabilityTargetRounds);
                 FriabilityRemainingRounds = totalRounds;
                 FriabilityCurrentRpm = rpm;
                 await RefreshFriabilityRealtimeRoundsAsync();
                 await PulseCoilAsync(startCoil);
-                int durationMs = (int)Math.Ceiling(testTimeMin * 60 * 1000); // 总运行时间（毫秒）
+                bool targetRoundsReached = false;
 
-                for (int i = 0; i < durationMs; i += 100)
+                while (_isFriabilityRunning)
                 {
-                    // 如果用户点了停止，只结束脆碎度测试，不影响其它测试
-                    if (!_isFriabilityRunning)
+                    await RefreshFriabilityRealtimeRoundsAsync();
+
+                    double completedRounds = Math.Max(0, FriabilityRealtimeRounds);
+                    FriabilityRemainingRounds = (int)Math.Ceiling(Math.Max(0, totalRounds - completedRounds));
+                    if (completedRounds >= totalRounds)
+                    {
+                        targetRoundsReached = true;
+                        FriabilityRemainingRounds = 0;
                         break;
-
-                    // 计算当前剩余圈数
-                    double elapsedMs = i;
-                    double elapsedRounds = rpm / 60 / 1000 * elapsedMs;
-                    int remainingRounds = (int)Math.Ceiling(totalRounds - elapsedRounds);
-
-                    // 更新界面绑定的剩余圈数
-                    FriabilityRemainingRounds = remainingRounds;
-                    if (i % 500 == 0)
-                        await RefreshFriabilityRealtimeRoundsAsync();
+                    }
 
                     // 等待100ms，再更新下一次
                     await Task.Delay(100);
                 }
-                if (!_isFriabilityRunning)
+                if (!_isFriabilityRunning || !targetRoundsReached)
                     throw new InvalidOperationException("脆碎度测试已停止，未保存结果");
 
+                if (_plcConfig.FriabilityStartCoilStop != 0)
+                    await PulseCoilAsync(_plcConfig.FriabilityStartCoilStop);
+
                 double weightAfter = await ReadFriabilityWeightAsync(ResolveFriabilityWeightAfterRegister(), "脆碎后重量");
                 SetFriabilityWeightFromPlc(weightAfter: weightAfter);
                 FriabilityCurrentRpm = rpm;
@@ -1982,8 +1981,8 @@ namespace TabletTester2025.ViewModels
 
             try
             {
-                int value = await _plc.ReadIntAsync(registerAddress);
-                if (value >= 0)
+                double value = await _plc.ReadFloatAsync(registerAddress);
+                if (double.IsFinite(value) && value >= 0)
                     FriabilityRealtimeRounds = value;
             }
             catch
diff --git a/Views/MainWindow.xaml b/Views/MainWindow.xaml
index 84c297c..ae26524 100644
--- a/Views/MainWindow.xaml
+++ b/Views/MainWindow.xaml
@@ -494,7 +494,7 @@
                                         <Border Style="{StaticResource MetricCard}">
                                             <StackPanel>
                                                 <TextBlock Text="实时圈数" Style="{StaticResource MetricLabel}"/>
-                                                <TextBlock Text="{Binding FriabilityRealtimeRounds}" Foreground="#1565C0" Style="{StaticResource MetricValue}"/>
+                                                <TextBlock Text="{Binding FriabilityRealtimeRounds, StringFormat=F1}" Foreground="#1565C0" Style="{StaticResource MetricValue}"/>
                                             </StackPanel>
                                         </Border>
                                         <Border Style="{StaticResource MetricCard}">
diff --git a/appsettings.json b/appsettings.json
index b80f9a2..dc59634 100644
--- a/appsettings.json
+++ b/appsettings.json
@@ -29,7 +29,7 @@
     "FriabilityRpm": 320, // 脆碎度转速 r/min
     "FriabilityRounds": 410, // 脆碎圈数
     "FriabilityRoundsBox": 410, // 兼容旧字段：脆碎圈数
-    "FriabilityRealtimeRounds": 82, // 脆碎实时圈数
+    "FriabilityRealtimeRounds": 82, // 脆碎实时圈数，32位浮点
     "DisintegrationSeconds": 420, //崩解时间