更新20260519

Services/ModbusTcpPlcService.cs

@@ -95,7 +95,7 @@ namespace TabletTester2025.Services
         public async Task<float> ReadFloatAsync(ushort startAddress)
         {
             var registers = await ReadHoldingRegistersAsync(startAddress, 2);
-            return UshortToFloat(registers[1], registers[0]);
+            return RegistersToFloat(registers[0], registers[1]);
         }
 
         public async Task<int> ReadIntAsync(ushort startAddress)
@@ -122,13 +122,10 @@ namespace TabletTester2025.Services
 
         public Task WriteFloatAsync(ushort startAddress, float value)
         {
-            byte[] bytes = BitConverter.GetBytes(value);
+            if (!float.IsFinite(value))
-            ushort[] registers =
+                throw new ArgumentOutOfRangeException(nameof(value), "PLC浮点写入值不能是NaN或Infinity。");
-            {
-                (ushort)((bytes[2] << 8) | bytes[3]),
-                (ushort)((bytes[0] << 8) | bytes[1])
-            };
 
+            ushort[] registers = FloatToRegisters(value);
             return ExecuteAsync(master => master.WriteMultipleRegistersAsync(_config.SlaveId, startAddress, registers));
         }
 
@@ -168,16 +165,28 @@ namespace TabletTester2025.Services
             }
         }
 
-        private static float UshortToFloat(ushort high, ushort low)
+        private static float RegistersToFloat(ushort highWord, ushort lowWord)
         {
-            byte[] bytes = new byte[4];
+            byte[] bytes =
-            bytes[0] = (byte)(high >> 8);
+            {
-            bytes[1] = (byte)(high & 0xFF);
+                (byte)(lowWord & 0xFF),
-            bytes[2] = (byte)(low >> 8);
+                (byte)(lowWord >> 8),
-            bytes[3] = (byte)(low & 0xFF);
+                (byte)(highWord & 0xFF),
+                (byte)(highWord >> 8)
+            };
             return BitConverter.ToSingle(bytes, 0);
         }
 
+        private static ushort[] FloatToRegisters(float value)
+        {
+            byte[] bytes = BitConverter.GetBytes(value);
+            return new[]
+            {
+                (ushort)((bytes[3] << 8) | bytes[2]),
+                (ushort)((bytes[1] << 8) | bytes[0])
+            };
+        }
+
         private void CloseConnection()
         {
             try { _master?.Dispose(); } catch { }

ViewModels/StationViewModel.cs

@@ -1039,8 +1039,8 @@ namespace TabletTester2025.ViewModels
             try
             {
                 _isLoadingFriabilityTime = true;
-                float value = await _plc.ReadFloatAsync(registerAddress);
+                int value = await _plc.ReadIntAsync(registerAddress);
-                if (float.IsFinite(value) && value > 0)
+                if (value > 0)
                 {
                     FriabilityTargetTimeMin = value;
                 }
@@ -1108,7 +1108,7 @@ namespace TabletTester2025.ViewModels
 
             try
             {
-                await _plc.WriteFloatAsync(registerAddress, (float)value);
+                await _plc.WriteRegisterAsync(registerAddress, ToPlcTimeRegisterValue(value));
             }
             catch { }
         }
@@ -1233,16 +1233,24 @@ namespace TabletTester2025.ViewModels
 
         private async Task WriteDisintegrationTimeAsync(double value)
         {
-            if (_plcConfig.DisintegrationTime == 0 || value <= 0)
+            if (_plcConfig.DisintegrationTime == 0 || value <= 0 || !double.IsFinite(value))
                 return;
 
             try
             {
-                await _plc.WriteFloatAsync(_plcConfig.DisintegrationTime, (float)value);
+                await _plc.WriteRegisterAsync(_plcConfig.DisintegrationTime, ToPlcTimeRegisterValue(value));
             }
             catch { }
         }
 
+        private static ushort ToPlcTimeRegisterValue(double value)
+        {
+            return (ushort)Math.Clamp(
+                (int)Math.Round(value, MidpointRounding.AwayFromZero),
+                0,
+                ushort.MaxValue);
+        }
+
         private async Task WriteDisintegrationSpeedAsync(double value)
         {
             if (_plcConfig.DisintegrationSpeed == 0 || value <= 0)

Views/ShowData.xaml.cs

@@ -60,8 +60,7 @@ namespace 片剂四用仪.Views
                         else
                         {
                             float value = await _plc.ReadFloatAsync((ushort)m.Address);
-
+                            Dispatcher.Invoke(() => tb.Text = float.IsFinite(value) ? value.ToString("0.###") : string.Empty);
-                            Dispatcher.Invoke(() => tb.Text = value.ToString("F2"));
 
                         }
                     }
@@ -114,9 +113,9 @@ namespace 片剂四用仪.Views
                 }
                 else
                 {
-                    if (double.TryParse(textBox.Text, out double val))
+                    if (double.TryParse(textBox.Text, out double val) && double.IsFinite(val))
                     {
-                        textBox.Text = val.ToString("F3");
+                        textBox.Text = val.ToString("0.###");
                         await _plc.WriteFloatAsync((ushort)mapping.Address, (float)val);
                     }
                 }
@@ -139,7 +138,7 @@ namespace 片剂四用仪.Views
             new PlcParamMapping("txt_WeightLossRate", 416, PlcParamType.Int),
 
             new PlcParamMapping("txt_DisintegrationSpeed", 330, PlcParamType.Float),
-            new PlcParamMapping("txt_DisintegrationTime", 420, PlcParamType.Float),
+            new PlcParamMapping("txt_DisintegrationTime", 420, PlcParamType.Int),
 
             new PlcParamMapping("txt_DissolutionTime", 430, PlcParamType.Int),
             new PlcParamMapping("txt_Dissolution1SamplingInterval", 432, PlcParamType.Float),