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what is OB 121 ? Trouble Shooting Programming Errors with OB 121 ? || PLC Programming for Beginners - YouTube
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How do you use the "AUX_PRxx" inputs for message-associated values of an SFC insta... - ID: 29338836 - Industry Support Siemens
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OB121 - NÃO COMETA ESSE ERRO PROGRAMANDO O CLP SIEMENS - SIMATIC MANAGER *Programming Error* #70 - YouTube
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