diff --git a/Mesnac.DoUtils.zip b/Mesnac.DoUtils.zip
new file mode 100644
index 0000000..eb2344b
Binary files /dev/null and b/Mesnac.DoUtils.zip differ
diff --git a/Mesnac.DoUtils/DoControl.cs b/Mesnac.DoUtils/DoControl.cs
index e03ff4e..d261e13 100644
--- a/Mesnac.DoUtils/DoControl.cs
+++ b/Mesnac.DoUtils/DoControl.cs
@@ -18,7 +18,7 @@ namespace Mesnac.DoUtils
         public SerialPort serialPort = new SerialPort("COM5");
         private static readonly Lazy<DoControl> lazy = new Lazy<DoControl>(() => new DoControl());
         public static DoControl Instance => lazy.Value;
-
+        public bool AlarmState { get; private set; } = false;
         private DoControl()
         {
             serialPort.BaudRate = 115200;
@@ -125,11 +125,20 @@ namespace Mesnac.DoUtils
 
         /// <summary>
         /// DO启停控制
+        /// 如果收到红灯亮的信号，AlarmState会变为True; 收到红灯灭的信号，AlarmState设置为false
         /// </summary>
         /// <param name="dOName">DegitalOut接口名称</param>
         /// <param name="dOOnOff">启停状态</param>
         public void DOControl(DOName dOName, DOOnOff dOOnOff)
         {
+            if(dOName.Equals(DOName.Red) && dOOnOff.Equals(DOOnOff.On))
+            {
+                AlarmState = true;
+            }
+            if(dOName.Equals(DOName.Red) && dOOnOff.Equals(DOOnOff.Off))
+            {
+                AlarmState = false;
+            }
             if (serialPort.IsOpen)
             {
                 serialPort.Write(new byte[] { 0xE3, 0x01, 0x09, (byte)dOName, (byte)dOOnOff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0, 12);
@@ -137,6 +146,7 @@ namespace Mesnac.DoUtils
             else
             {
                 ComOn();
+                serialPort.Write(new byte[] { 0xE3, 0x01, 0x09, (byte)dOName, (byte)dOOnOff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0, 12);
             }
         }
 
diff --git a/Mesnac.PlcUtils.zip b/Mesnac.PlcUtils.zip
new file mode 100644
index 0000000..b4f5e66
Binary files /dev/null and b/Mesnac.PlcUtils.zip differ