我公司的一条生产线采用的是315-2DP的CPU，带3个ET200IS的从站，DP网络现在老是出现通信中断的情况，表现为，监控画面模拟量显示值变黑，时间1、2秒钟，在此过程中设备依旧正常运行，程序里有OB86的，检查了每个DP插头，都正常，主从站模块都检查了，现在还有这种现象，

还有一种情况是，生产线运行过程中停止，报警，重新启动正常运行，但影响一个模拟量状态，到该点后停止，现在原因也是不明，

我说的可能不太明白，请各位大侠给支招，看看丛什么方面入手检查，生产线以前运行正常

诊断信息

Diagnostic buffer of module CPU 315-2 DP

Order No./ Des cription Component Version
6ES7 315-2AG10-0AB0 Hardware 3
- - - Firmware V 2.0.8

Rack: 0
Slot: 2


Event 1 of 10: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 1
DP master system ID: 1
Log. base address of the DP slave: Input address: 2046
Log. base address of the DP master: 2047
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Outgoing event
09:58:59:972 am 04/10/09


Event 2 of 10: Event ID 16# 39C4
Distributed I/Os: station failure
Address of the affected DP slave: station number: 1
DP master system ID: 1
Log. base address of the DP slave: Input address: 2046
Log. base address of the DP master: 2047
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Incoming event
09:58:56:676 am 04/10/09