调试已经两周了，运行的还不错，今早1点突然LED全闪停机复位，停电重启后居然好了。只是DB块里面的数据全部复位了。所幸没有引起事故。真是惊出一头冷汗。
具体配置：315-2dp，带128kMMC卡，集成DP口带ET200站6个，扩展CP342-5的DP口带5611卡的工控机四台。
正常运行两周了。CPU故障缓冲区里面记得如下：
但是重启后的内容了，发生故障时的数据根本无法保存的。


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# 4302
Mode transition from STARTUP to RUN
Startup information:
- Time for time stamp at the last backed up power on
- Single processor operation
Current/last startup type:
- Warm restart triggered by switch setting; last power on backed up
Permissibility of certain startup types:
- Manual warm restart permitted
- Automatic warm restart permitted
Last valid operation or setting of automatic startup type at power on:
- Warm restart triggered by switch setting; last power on backed up
Previous operating mode: STARTUP (warm restart)
Requested operating mode: RUN
Incoming event
12:56:18.471 AM 03/24/2010


Event 2 of 10: Event ID 16# 1381
Request for manual warm restart
Startup information:
- Startup without modified system configuration
- No difference between setpoint and actual configuration
- Time for time stamp at the last backed up power on
- Single processor operation
Current/last startup type:
- Warm restart triggered by switch setting; last power on backed up
Permissibility of certain startup types:
- Manual warm restart permitted
- Automatic warm restart permitted
Last valid operation or setting of automatic startup type at power on:
- Warm restart triggered by switch setting; last power on backed up
Requested OB: Startup OB (OB100)
Priority class: 27
Incoming event
12:56:18.470 AM 03/24/2010


Event 3 of 10: Event ID 16# 4301
Mode transition from STOP to STARTUP
Startup information:
- Time for time stamp at the last backed up power on
- Single processor operation
Current/last startup type:
- Warm restart triggered by switch setting; last power on backed up
Permissibility of certain startup types:
- Manual warm restart permitted
- Automatic warm restart permitted
Last valid operation or setting of the automatic startup type at power on:
- Warm restart triggered by switch setting; last power on backed up
Previous operating mode: STOP (internal)
Requested operating mode: STARTUP (warm restart)
Incoming event
12:56:15.560 AM 03/24/2010


Event 4 of 10: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 8
DP master system ID: 1
Log. base address of the DP slave: Input address: 2036
Log. base address of the DP master: 32767
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
12:56:13.452 AM 03/24/2010


Event 5 of 10: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 7
DP master system ID: 1
Log. base address of the DP slave: Input address: 2038
Log. base address of the DP master: 32767
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
12:56:13.259 AM 03/24/2010


Event 6 of 10: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 6
DP master system ID: 1
Log. base address of the DP slave: Input address: 2040
Log. base address of the DP master: 32767
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
12:56:13.035 AM 03/24/2010


Event 7 of 10: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 5
DP master system ID: 1
Log. base address of the DP slave: Input address: 2042
Log. base address of the DP master: 32767
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
12:56:12.621 AM 03/24/2010


Event 8 of 10: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 4
DP master system ID: 1
Log. base address of the DP slave: Input address: 2044
Log. base address of the DP master: 32767
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
12:56:11.569 AM 03/24/2010


Event 9 of 10: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 3
DP master system ID: 1
Log. base address of the DP slave: Input address: 2046
Log. base address of the DP master: 32767
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
12:56:11.353 AM 03/24/2010


Event 10 of 10: Event ID 16# 5371
Distributed I/Os: end of the synchronization with a DP master
Slot of the DP master: 2
Number of distributed stations: 6
Incoming event
12:56:09.731 AM 03/24/2010