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There's your cycle. OB1 runs top to bottom, once per cycle. Network 1 reads Part_Present as the previous cycle left it. Network 2 then sets it. The ne...

It's not the cable and not the firmware. The buffer already told you: OB86 isn't in the CPU. Which STEP 7 version, and have you got the project? Look ...

Yes. VAT is the variable table. ITD gives you a DINT, DIV_DI on two DINTs gives you a DINT, so 10018 / 6912 is 1 and the .449 is gone before you ever ...