diff --git a/Service/Plc/Client/PlcMgr.cs b/Service/Plc/Client/PlcMgr.cs
index 664f832..aa1b23a 100644
--- a/Service/Plc/Client/PlcMgr.cs
+++ b/Service/Plc/Client/PlcMgr.cs
@@ -182,12 +182,18 @@ public class PlcMgr
 
         return false;
     }
-
+    static bool heart = false;
+    /// <summary>
+    /// 发送心跳
+    /// </summary>
+    /// <returns></returns>
     public static bool SendHear()
     {
         if (PlcClient != null)
         {
             HostToPlc writeHostToPlc = new HostToPlc();
+            heart = !heart;
+            writeHostToPlc.CommunicationDiagnosis.Value = (ushort)(heart ? 1 : 0);
             writeHostToPlc.Years.Value = (ushort)DateTime.Now.Year;
             writeHostToPlc.Month.Value = (ushort)DateTime.Now.Month;
             writeHostToPlc.Day.Value = (ushort)DateTime.Now.Day;
@@ -195,6 +201,7 @@ public class PlcMgr
             writeHostToPlc.Points.Value = (ushort)DateTime.Now.Minute;
             writeHostToPlc.Seconds.Value = (ushort)DateTime.Now.Second;
 
+            bool write1 = PlcClient.WriteValue(writeHostToPlc.CommunicationDiagnosis);
             bool write1 = PlcClient.WriteValue(writeHostToPlc.Years);
             bool write2 = PlcClient.WriteValue(writeHostToPlc.Month);
             bool write3 = PlcClient.WriteValue(writeHostToPlc.Day);