各位大侠，
最近接手一台设备，使用了DP Coupler，但是另外一边profibus通讯由于设计更改，没有接线，所以DP Coupler除了自身的BF1灯灭，其它的几个灯SF1，SF2，BF2灯都常亮。现在PLC的CPU报警灯SF常亮，我查看诊断信息，涉及到了诊断地址导致报警。我想大家有没有遇到过，DPcoupler的另外一端空余，会不会SF灯常亮？
另外一点，查看下面的诊断文件，机器初始启动的时候调用了OB块，但是为什么当我将CPU由RUN打到STOP再次打到RUN上面，SF灯仍然亮着？已经没有扫描到需要调用OB8*的程序了？
非常感谢！
附，诊断文件：

Diagnostic buffer of module CPU 317-2 PN/DP

Order No./ Des cription Component Version
6ES7 317-2EK14-0AB0 Hardware 4
- - - Firmware V 3.2.8
Boot Loader Firmware expansion A 32.9.9

Rack: 0
Slot: 2


Serial number: S C-DNTR73222013


Event 1 of 114: 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
12:37:37.766 PM 06/04/2014
(Coding: 16# 4302 FF68 C700 0000 0810 7710)


Event 2 of 114: 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
12:37:37.762 PM 06/04/2014
(Coding: 16# 1382 1B64 C772 494E 0810 7710)


Event 3 of 114: 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
12:37:37.662 PM 06/04/2014
(Coding: 16# 4301 FF46 C772 494E 0810 7710)


Event 4 of 114: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 36
DP master system ID: 1
Log. base address of the DP slave: Input address: 8151
Log. base address of the DP master: 8191
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
12:37:36.942 PM 06/04/2014
(Coding: 16# 38C4 FE56 C054 1FFF 1FD7 0124)


Event 5 of 114: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 32
DP master system ID: 1
Log. base address of the DP slave: Input address: 8175
Log. base address of the DP master: 8191
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
12:37:36.862 PM 06/04/2014
(Coding: 16# 38C4 FE56 C054 1FFF 1FEF 0120)


Event 6 of 114: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 30
DP master system ID: 1
Log. base address of the DP slave: Input address: 8176
Log. base address of the DP master: 8191
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
12:37:36.782 PM 06/04/2014
(Coding: 16# 38C4 FE56 C054 1FFF 1FF0 011E)


Event 7 of 114: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 15
DP master system ID: 1
Log. base address of the DP slave: Input address: 8180
Log. base address of the DP master: 8191
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
12:37:36.689 PM 06/04/2014
(Coding: 16# 38C4 FE56 C054 1FFF 1FF4 010F)


Event 8 of 114: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 10
DP master system ID: 1
Log. base address of the DP slave: Input address: 8188
Log. base address of the DP master: 8191
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
12:37:36.533 PM 06/04/2014
(Coding: 16# 38C4 FE56 C054 1FFF 1FFC 010A)


Event 9 of 114: Event ID 16# 3842
Module OK
Module type: Distributed I/0s
Input address: 8151
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
12:37:36.489 PM 06/04/2014
(Coding: 16# 3842 FE52 C554 1FD7 0063 0000)