CodeSys如何在两个PLC之间通信

codesys如何在两个不同的PLC程序之间通信，版本为V3.5。

 属性            大小     日期    时间   名称
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     目录           0  2014-04-03 21:46  DeviceDescription\
     文件       88901  2013-03-15 20:37  DeviceDescription\CoDeSysControlWinV3000000013.5.1.40.devdesc.xml
     目录           0  2014-04-03 21:46  File\
     文件      539900  2013-03-15 20:32  File\PLCChat.project
     目录           0  2014-04-03 21:46  Library\
     目录           0  2014-04-03 21:46  LibraryProfile\
     文件         194  2013-03-15 20:37  LibraryProfile\AlarmManager.libraryprofile
     文件         192  2013-03-15 20:37  LibraryProfile\Collections.libraryprofile
     文件         186  2013-03-15 20:37  LibraryProfile\IecTypes.libraryprofile
     文件         207  2013-03-15 20:37  LibraryProfile\Standard.libraryprofile
     文件         192  2013-03-15 20:37  LibraryProfile\StringUtils.libraryprofile
     文件         188  2014-04-03 21:23  LibraryProfile\SysTarget.libraryprofile
     文件         218  2013-03-15 20:37  LibraryProfile\System_VisuElembase.libraryprofile
     文件         220  2013-03-15 20:37  LibraryProfile\System_VisuElemMeter.libraryprofile
     文件         212  2013-03-15 20:37  LibraryProfile\System_VisuElems.libraryprofile
     文件         222  2013-03-15 20:37  LibraryProfile\System_VisuElemsAlarm.libraryprofile
     文件         242  2013-03-15 20:37  LibraryProfile\System_VisuElemsSpecialControls.libraryprofile
     文件         234  2013-03-15 20:37  LibraryProfile\System_VisuElemsWinControls.libraryprofile
     文件         220  2013-03-15 20:37  LibraryProfile\System_VisuElemTrace.libraryprofile
     文件         214  2013-03-15 20:37  LibraryProfile\System_VisuInputs.libraryprofile
     文件         228  2013-03-15 20:37  LibraryProfile\System_VisuNativeControl.libraryprofile
     文件         193  2013-03-15 20:37  LibraryProfile\SysTimeCore.libraryprofile
     文件         191  2013-03-15 20:37  LibraryProfile\SysTimeRtc.libraryprofile
     文件         194  2013-03-15 20:37  LibraryProfile\TraceManager.libraryprofile
     文件       40040  2013-03-15 20:37  Library\3slicense.compiled-library-ge33
     文件      393875  2013-03-15 20:37  Library\alarmmanager.compiled-library-ge33
     文件       61175  2013-03-15 20:37  Library\alarmmanageritfs.compiled-library-ge33
     文件       14669  2013-03-15 20:37  Library\base_itfs.compiled-library-ge33
     文件       31481  2013-03-15 20:37  Library\caa_asyncman_extern.compiled-library-ge33
     文件       43785  2013-03-15 20:37  Library\caa_behaviourmodel.compiled-library-ge33
     文件       38340  2013-03-15 20:37  Library\caa_callback_extern.compiled-library-ge33
............此处省略222个文件信息