I have been working with Siemens PLCs, Drives and HMI for many, many years. Currently I am installing a machine in the USA that was originally made in Germany back in the late 1980s which I am ashamed to admit that I was there at startup as a newbie engineer for a couple of days.
I have been translating German to English symbols and descriptions plus dealing with the STL logic being thrown in here and there. Frankly I have have hit a mental road block with the STL. It maybe that I have lost my mind or totally lost my mind. Can anybody please look at the attached logic and explain to me why memory bit M0.3 isn't turning on in the rest of the PLC logic.
I have been translating German to English symbols and descriptions plus dealing with the STL logic being thrown in here and there. Frankly I have have hit a mental road block with the STL. It maybe that I have lost my mind or totally lost my mind. Can anybody please look at the attached logic and explain to me why memory bit M0.3 isn't turning on in the rest of the PLC logic.