datalist:10数据库“tempdb”的事务日志已满，原因为“ACTIVE_TRANSACTION”。   在 System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   在 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   在 System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   在 System.Data.SqlClient.SqlDataReader.TryConsumeMetaData()
   在 System.Data.SqlClient.SqlDataReader.get_MetaData()
   在 System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted)
   在 System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest)
   在 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
   在 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
   在 System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
   在 System.Data.SqlClient.SqlCommand.ExecuteReader()
   在 B2b.Shop.ShopBase.GetDataList(Int32 iValue, Int32 iSize, List`1& loValues) 位置 f:\mywork\b2b168\b2bweb\B2bBase\ShopBase.cs:行号 4543datalist:8数据库“tempdb”的事务日志已满，原因为“ACTIVE_TRANSACTION”。   在 System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   在 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   在 System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   在 System.Data.SqlClient.SqlDataReader.TryConsumeMetaData()
   在 System.Data.SqlClient.SqlDataReader.get_MetaData()
   在 System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted)
   在 System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest)
   在 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
   在 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
   在 System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
   在 System.Data.SqlClient.SqlCommand.ExecuteReader()
   在 B2b.Shop.ShopBase.GetDataList(Int32 iValue, Int32 iSize, List`1& loValues) 位置 f:\mywork\b2b168\b2bweb\B2bBase\ShopBase.cs:行号 4543datalist:5数据库“tempdb”的事务日志已满，原因为“ACTIVE_TRANSACTION”。   在 System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   在 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   在 System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   在 System.Data.SqlClient.SqlDataReader.TryConsumeMetaData()
   在 System.Data.SqlClient.SqlDataReader.get_MetaData()
   在 System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted)
   在 System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest)
   在 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
   在 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
   在 System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
   在 System.Data.SqlClient.SqlCommand.ExecuteReader()
   在 B2b.Shop.ShopBase.GetDataList(Int32 iValue, Int32 iSize, List`1& loValues) 位置 f:\mywork\b2b168\b2bweb\B2bBase\ShopBase.cs:行号 4543<!DOCTYPE html>
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<h1 title="西门子6ES72162AD230XB0">西门子6ES72162AD230XB0</h1>
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发货地址：上海市松江区   &nbsp;<br />
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<span class="ssx01">型号</span><span class="ssx02">西门子1.1KW变频器</span>
<span class="ssx01">品牌</span><span class="ssx02">西门子</span>
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<p><span style="font-size:14px">西门子6ES72162AD230XB0</span></p><p><span style="font-size:14px"></span></p><p style="background:white"><strong><span style="font-size:18.0pt;font-family:宋体;color:#ee33ee">上海朕锌电气电气设备有限公司<span></span></span></strong></p><strong><span style="font-size:18.0pt;font-family:&quot;color:#ee33ee">SIEMENS</span></strong><strong><span style="font-size:18.0pt;font-family:宋体;color:#ee33ee">西门子</span></strong><br><p></p><p><span style="font-size:14px"></span></p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff"><strong style="box-sizing:border-box">应用的基本信息&nbsp;</strong></p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff">生产线三台设备连接，每台一个s7-1515PLC和7寸精致触摸屏，*三台因为有个松下伺服电机，多一个s7-1215plc，上位机labview,设备中除一台激光打标机外其余全部常规元器件。</p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff"><strong style="box-sizing:border-box">2.问题描述&nbsp;</strong></p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff">现场较初采用了S7协议，调试后运行一个月后出现一次s7-1515plc和s7-1215plc断开无法重新连接，重新载入程序也无法通讯，大约1个小时候后连接自动恢复正常，因技术要求规定了使用s7协议，当时未更改，一年后再次出现该问题，改为PN后问题消失&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff"><strong style="box-sizing:border-box">3.问题的分解和解决</strong></p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff">3.1&nbsp;</p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff">现场检查了项目的配置，发现没有配置错误的问题。</p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff">现场检查了连接线束，网线和网线头全部西门子，未发现问题。</p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff">查看是否是MOXA交换机引起的问题。取消交换机直接连接，一年后重复发生该问题</p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff">通讯数据量不大，约20个双字&nbsp;</p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff">3.2故障或问题处理</p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff">把S7协议换成profinet协议，问题解决。</p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff"><strong style="box-sizing:border-box">4.经验总结</strong></p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff">4.1遗留的问题（问题排查后，是否对解决问题的方式仍然有些疑问或者不理解的地方）</p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff">问题虽然解决了，一直存在两个疑惑，在这种通信低要求场合（周期0.5-1S）&nbsp;</p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff">**，s7协议在屏幕和plc&nbsp; 同系列PLC之间未遇到该问题,不同系列或者说非官方（屏幕和plc）下这种问题出的比较多，可能原因在哪里</p><p style="box-sizing:border-box;font-family:&quot;padding:0px;color:#333333;background-color:#ffffff">*二，在与第三方设备通讯中，由于不支持PN协议，采用s7协议，遇到这种一直无法建立连接情况，对照PROFINET协议优势，是否可以通过程序做些辅助功能避免该问题</p><br><p></p><br /><a href="http://zx2013.cn.b2b168.com/">http://zx2013.cn.b2b168.com</a>
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