本人愿和同道中人共同探讨西门子技术范围包括(200/300/400/Wincc/Hmi)
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to hh.carlo,
W#16#2942 I/O access error, reading OB 122
You must concentrate on two things, besides collecting the diagnostic messages from all affected modules, as suggested earlier: This, by the way, would be essential, especially on the AI modules.
You get the message "the configuration of the station in HW is defferent than the exist in the plant" when this requirement is marked with a check in the CPU propertiies (HWConfig). If this is checked, your DP master will only operate if there are no diagnostic messages from the configured slaves. Unchecking this requirement will allow the master to connect to slaves that do not give diagnostic messages.
Second: your ET 200M IMs are giving diagnostic errors because they cannot reach certain addresses (these you show in the diagnostic buffer messages). So: are these addresses the ones of the AI modules that also show fault signals? If they are: What is the diagnostic buffer contents for these modules (double-click on the AI modules marked with a red slash in the Online view of HWConfig). Please then start by fixing the problem on these modules, then see if this clears the faults on the ET 200M stations.
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剑工你好:
端午节快乐!!!
我用的是S7-200 系列CPU224XP,在连接了一个EM231模拟量输入模块,我输入的是一个4-20MA差压信号, 对应的输出是1-10KPA的压力值,
我先编了单个的模拟量输入程序来调试模块,PLC本身的模拟量输入和输出M I V M A+ B+ ,我没有连接,但是EM231模拟量输入模块其他的3个未用输入端
我把B+ B_ ,C+ C- ,D+ D- 按照要求短接起来,只用了RA, A+ A_,但是我在执行程序时却没有输出

我不知道程序是否有问题,可以给我指导下吗???
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