1783-MS06T
1783-MS06T
1783-MS06T
OPC客户和OPC服务器进行数据交互有2种访问方式:同步和异步方式。
同步方式实现较为简单,客户向服务器发出读写请求,然后等待服务器返回信息,当***较少而且同服务器交互的数据量比较少的时候可以采用这种方式,然而当网络堵塞或大量客户访问时,会造成系统的性能效率下降。
异步方式实现较为复杂,客户向服务器发出读写请求后,服务器立刻返回信息表示请求已接受,客户可以进行其他处理,当服务器完成读写操作后,通过调用回调函数,通知客户程序操作完成,并传递相应的信息,因此异步方式的效率更高,能够避免多客户大数据请求的阻塞,并可以***大限度地节省CPU和网络资源。另外一种异步方式是服务器周期性的扫描缓冲区的数据,发现数据变化范围超过死区后,立刻通知客户程序,传递相应信息。
【***】 【诚信】 【创新】 【合作】 【共赢】
厦门泰尼电气有限公司
【产品质量】原装进口***
【检测标准】按原厂标准
【产品质保】 1 年
【快递时间】24 小时 到【联系我们】
& 业务经理 : 小黄
& 洽谈电话 : 0592-6809319/ 18950191386
& 商务 *** : 2917675397
& 传真(FAX): 0592-6890859 (请注明,01006 收)
& 公司全称 :
厦门泰尼电气有限公司
& 公司地址 :
厦门市海沧区海沧街道滨湖一里1号楼
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