Event 27 of 120: Event ID 494D
Stop caused by i/o error
no relevance for user (z1): 941a
no relevance for user (z2): 000f (z3):44ab
previous operating mode :run
previous operating mode :stop (interna;)
external error, incoming event
11:19:54.471 pm 04/17/2014
问题补充：
已有OB82 OB86 OB121 OB122
no relevance for user (z1): 941a
no relevance for user (z2): 000f (z3):44ab这个是什么意思呢，能分析出停机原因吗？
最佳答案
1、如何解决：由I/O引起的STOP模式？
这个问题要认真检查与I/O相关的所有之处，例如模板的安装、电源、接线及现场干扰等。如果故障原因不排斥，只通过添加OB121和OB122使之不停机，这种带故障运行方法是不安全的。必须要仔细进行论证、评估带这种故障继续运行会有什么后果。如确认是安全的才能添加OB121和OB122使之不停机。
2、Stop caused by i/o error：
上述诊断信息表明为I/O错误 user (z1): 941a
no relevance for user (z2): 000f (z3):44ab
上述诊断信息表明为I/O错误。
2、可能的原因：
转帖：
、S7-300:
A module was removed or inserted illegally.模板被拆除或安装有问题。
、 S7-400:
Failure of the module inserted/removed monitoring or error in interrupt servicing due to a defective module or due to removing or inserting a module illegally.
To correct or avoid errors:
Based on the system status lists, check the current I/O configuration detected by the CPU. Compare this with the existing configuration to see whether there are any defective modules.
· Bus error in the local or distributed I/O
To correct or avoid error:
To remove the error, you must switch the device off and then on again. If the error still occurs, check the bus connection and interface modules in the distributed I/O. Make a note of the HEX code marked as "Not user-relevant" in the detailed information for the diagnostic buffer entry and contact your manufacturer.
· This error can occur when an expansion device is switched off, for example, if an IM module is defective.
To Correct or Avoid Error:
Replace the defective module.
提问者对于答案的评价：
3Q
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/plc233522.html
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