ViewModels/MainViewModel.cs

@@ -78,6 +78,9 @@ namespace MembranePoreTester.ViewModels
                     if (SetProperty(ref _selectedPressureMode, value))
                     {
                         Task.Run(async () => await WritePressureModeAsync(value?.Text ?? "低压"));
+
+                        // 切换模式后调整加压上限
+                        AdjustPressureLimitForMode();
                     }
                 }
             }
@@ -544,6 +547,37 @@ namespace MembranePoreTester.ViewModels
 
 
 
+            // 在 StationItem 类中添加以下方法
+            private void AdjustPressureLimitForMode()
+            {
+                bool isLowPressure = (SelectedPressureMode?.Text == "低压");
+                double currentLimit = _pressureUpperLimit;
+                double newLimit = currentLimit;
+
+                if (isLowPressure && currentLimit > 200)
+                    newLimit = 200;
+                else if (!isLowPressure && currentLimit > 1000)
+                    newLimit = 1000;
+                else
+                    return;
+
+                // 直接修改字段，避免触发 setter 中的校验和重复写 PLC
+                _pressureUpperLimit = newLimit;
+                OnPropertyChanged(nameof(PressureUpperLimit));
+
+                // 写回 PLC
+                ushort address = StationId == 1 ? _plcConfig.PressureUpperLimit
+                               : StationId == 2 ? _plcConfig.PressureUpperLimit2
+                               : _plcConfig.PressureUpperLimit3;
+                _ = _plcService.WriteMultipleRegistersAsync(address, (float)newLimit);
+            }
+
+
+
+
+
+
+
         }