如果连接已经关闭就不要在读了

8 years ago · 3df8e94f07
1 changed files with 1 additions and 1 deletions
--- a/SCADA/Program/DataService/PLCGroup.cs
+++ b/SCADA/Program/DataService/PLCGroup.cs
@ -305,7 +305,7 @@ namespace DataService
        object sync = new object();
        protected void timer_Timer(object sender, EventArgs e)
        {
-            if (_isActive)
+            if (_isActive && !_plcReader.IsClosed)
            {
                lock (sync)
                {