奇怪现象，CPU 313C-2DP 只有在CP5611卡 接到CPU MPI 端口上 CPU 才能正常工作
现在遇到一个奇怪的现象！
硬件配置 CPU313C-2DP +CP343-1 lean +CP340 422/485
遇到问题： 只有在通过CP5611卡 MPI 链接成功后，才能用CP343-1 下载/监控程序！
如果CP5611卡 MPI 没有链接（MPI插头没插或者安装CP5611卡的计算机没有开机）， 通过CP343-1 就报错误无法与CPU通讯
（33：16662）

只有在CP5611卡上电并插入cpu的mpi接头上 就可以通过CP343-1 下载/监控程序！

百思不得其解！
大家有遇到同样现象的吗？


重新测试发现是CPU mpi端口插个总线接头，终端电阻拨到ON 上CPU 就能正常工作，off上 就不能正常运行

附上诊断代码
Diagnostic buffer of module CPU 313C-2 DP

Order No./ Des cription Component Version
6ES7 313-6CF03-0AB0 Hardware 2
- - - Firmware V 2.6.6
Boot Loader Firmware expansion A 0.21.0

Rack: 0
Slot: 2


Serial number: S C-W6VC43722008


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:
- Automatic warm restart after backed up power on
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:
- Automatic warm restart after backed up power on
Previous operating mode: STARTUP (warm restart)
Requested operating mode: RUN
Incoming event
09:34:01.381 AM 08/07/2013
(Coding: 16# 4302 FF68 C700 0000 0810 7710)


Event 2 of 10: Event ID 16# 1382
Request for automatic warm restart
STOP due to: Power failure
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:
- Automatic warm restart after backed up power on
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:
- Automatic warm restart after backed up power on
Requested OB: Startup OB (OB100)
Priority class: 27
Incoming event
09:34:01.379 AM 08/07/2013
(Coding: 16# 1382 1B64 C772 494E 0810 7710)


Event 3 of 10: Event ID 16# 4301
Mode transition from STOP to STARTUP
STOP due to: Power failure
Startup information:
- Time for time stamp at the last backed up power on
- Single processor operation
Current/last startup type:
- Automatic warm restart after backed up power on
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:
- Automatic warm restart after backed up power on
Previous operating mode: STOP (internal)
Requested operating mode: STARTUP (warm restart)
Incoming event
09:34:00.729 AM 08/07/2013
(Coding: 16# 4301 FF46 C772 494E 0810 7710)


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: 1022
Log. base address of the DP master: 1023
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
09:33:54.440 AM 08/07/2013
(Coding: 16# 38C4 FE56 C054 03FF 03FE 0108)


Event 5 of 10: Event ID 16# 3842
Module OK
Module type: Distributed I/0s
Input address: 1022
User information available
Diagnostic interrupt from substitute
Requested OB: Diagnostic interrupt OB (OB82)
OB not found, or disabled, or cannot be started in the in the current operating mode
External error, Outgoing event
09:33:54.362 AM 08/07/2013
(Coding: 16# 3842 FE52 C554 03FE 0063 0000)


Event 6 of 10: Event ID 16# 5371
Distributed I/Os: End of the synchronization with a DP master/IO controller on slot 2
Number of distributed stations: 1
Incoming event
09:33:54.353 AM 08/07/2013
(Coding: 16# 5371 FF02 C150 0001 0000 0000)


Event 7 of 10: Event ID 16# 4358
All modules are ready for operation
Operating mode: STOP (internal)
Incoming event
09:33:52.167 AM 08/07/2013
(Coding: 16# 4358 FF44 0000 0000 0000 0000)


Event 8 of 10: Event ID 16# 4357
Module monitoring time started
Operating mode: STOP (internal)
Incoming event
09:33:47.001 AM 08/07/2013
(Coding: 16# 4357 FF44 0000 0000 0000 0000)


Event 9 of 10: Event ID 16# 4300
Power on backed up
Previous operating mode: No voltage
Requested operating mode: STOP (own initialization)
Incoming event
09:33:45.632 AM 08/07/2013
(Coding: 16# 4300 FFF3 0000 0000 0000 0000)


Event 10 of 10: Event ID 16# 494E
Power failure
Previous operating mode: STOP (internal)
Requested operating mode: No voltage
External error, Incoming event
09:33:31.234 AM 08/07/2013
(Coding: 16# 494E FF4F C000 0000 0000 0000)