s7 300dp通讯故障

cpu315-2dp的plc带了几个et200站，现在有一个分站18报故障。distributedi/os:stationreturn。但是在线监视硬件组态时，这个分站显示通讯正常，并未打叉，而是cpu显示打叉状态。cpu并未停机。诊断信息为：

event1of10:eventid16#38c4
distributedi/os:stationreturn
addressoftheaffecteddpslave:stationnumber:18
dpmastersystemid:1
log.baseaddressofthedpslave:inputaddress:2042
log.baseaddressofthedpmaster:2047
requestedob:rackfailureob(ob86)
priorityclass:26
externalerror,outgoingevent
01:13:42.716am01/28/1994

event2of10:eventid16#2942
i/oaccesserror,reading
parea,wordaccess,accessaddress:618
requestedob:i/oaccesserrorob(ob122)
priorityclass:1
externalerror,incomingevent
01:13:42.481am01/28/1994

event3of10:eventid16#2942
i/oaccesserror,reading
parea,wordaccess,accessaddress:616
requestedob:i/oaccesserrorob(ob122)
priorityclass:1
externalerror,incomingevent
01:13:42.481am01/28/1994

event4of10:eventid16#2942
i/oaccesserror,reading
parea,wordaccess,accessaddress:614
requestedob:i/oaccesserrorob(ob122)
priorityclass:1
externalerror,incomingevent
01:13:42.481am01/28/1994

event5of10:eventid16#2942
i/oaccesserror,reading
parea,wordaccess,accessaddress:612
requestedob:i/oaccesserrorob(ob122)
priorityclass:1
externalerror,incomingevent
01:13:42.481am01/28/1994

event6of10:eventid16#2942
i/oaccesserror,reading
parea,wordaccess,accessaddress:610
requestedob:i/oaccesserrorob(ob122)
priorityclass:1
externalerror,incomingevent
01:13:42.481am01/28/1994

event7of10:eventid16#2942
i/oaccesserror,reading
parea,wordaccess,accessaddress:608
requestedob:i/oaccesserrorob(ob122)
priorityclass:1
externalerror,incomingevent
01:13:42.481am01/28/1994

event8of10:eventid16#2942
i/oaccesserror,reading
parea,wordaccess,accessaddress:618
requestedob:i/oaccesserrorob(ob122)
priorityclass:1
externalerror,incomingevent
01:13:42.466am01/28/1994

event9of10:eventid16#2942
i/oaccesserror,reading
parea,wordaccess,accessaddress:616
requestedob:i/oaccesserrorob(ob122)
priorityclass:1
externalerror,incomingevent
01:13:42.466am01/28/1994

event10of10:eventid16#2942
i/oaccesserror,reading
parea,wordaccess,accessaddress:614
requestedob:i/oaccesserrorob(ob122)
priorityclass:1
externalerror,incomingevent
01:13:42.466am01/28/1994

问题补充：
是不是通讯干扰造成的呢？造成数据传输出现丢失的情况，但不影响通讯？？？？？

图片说明： 1，截图

佳答案

一般重新下载一下就可以了。