程序已正常使用多年，出现问题后，上载来仿真可以run。诊断如下：
Diagnostic buffer of module CPU 313C-2 DP
Order No./ Description Component Version
6ES7 313-6CF03-0AB0 Hardware 1
- - - Firmware V 2.0.12
Rack: 0
Slot: 2
Event 1 of 100: Event ID 16# 4562
STOP caused by programming error (OB not loaded or not possible, or no FRB)
Breakpoint in user program: Cyclic program (OB1)
Priority class: 1
FC number: 1
Module address: 378
Previous operating mode: RUN
Requested operating mode: STOP (internal)
Internal error, Incoming event
11:15:45.070 PM 04/27/2000
Event 2 of 100: Event ID 16# 2521
BCD conversion error
Affected register: accumulator 1
Requested OB: Programming error OB (OB121)
OB not found, or disabled, or cannot be started in the in the current operating mode
Internal error, Incoming event
11:15:45.056 PM 04/27/2000
Event 3 of 100: 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
11:15:45.033 PM 04/27/2000
Event 4 of 100: Event ID 16# 1381
Request for manual warm restart
STOP due to: STOP caused by programming error (OB not loaded or not possible, or no FRB)
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
11:15:45.032 PM 04/27/2000
最佳答案
1、诊断信息：
BCD conversion error
Affected register: accumulator 1
Requested OB: Programming error OB (OB121)
OB not found, or disabled, or cannot be started in the in the current operating mode
Internal error, Incoming event
STOP due to: STOP caused by programming error (OB not loaded or not possible, or no FRB)
从上述诊断信息可看出是由于编程错误引起的STOP ，具体是由BCD码转换的错误。如果忽略这种错误可添加OB121，只需添加不需编程。
2、关于OB组织块：
CPU程序块里面需要添加一些对应的OB组织块，只需添加不需编程，当发生相应故障是CPU只报警，不停机。如：
OB81 电源故障
OB82 诊断中断
OB83 插入/拔出模块中断
OB85 优先级错误
OB86 扩展机架，DP主站系统或者分布式I/O故障
OB87 通讯故障
OB121编程错误
OB122 I/O访问错误
提问者对于答案的评价：
谢谢
专家置评
已阅，最佳答案正确。
原创文章，作者：more0621，如若转载，请注明出处：https://www.zhaoplc.com/plc233547.html
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