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2/20/2008 10:05 AM | |
Posts: 33 Rating:
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Dear Sahlig! Your question is not trivial. You probably want to design a state machine on logic gates. Please note that LOGO! is just a relay that can be programmed. It is not a PLC. Ofcourse youcan design and put there state machine but I hope it's a simple one. Generally the simpliest way to create a state machine for programmeris to use two or three case statements. But Structured Text language is not supportedo for LOGO!. So you need to do it on logic gates. Designing FSM's on gates level is not hard for someone with some expirience with it. I would say that it is very logic and simple. You just have to go from step to step and in the end you have FSM. But If you didn't do it by now you will have to learn how to do it. Thereare many literature forthis subject. I'm sure If you will spend some time you will also find something you need on Internet. I spent some time to find anything. Here are some maybe usefull links: http://pages.cpsc.ucalgary.ca/~walpole/325/LECTURES/24%20Finite%20State%20Machines.html http://plato.acadiau.ca/courses/comp/Eberbach/comp1213/SLIDES/Part8.ppt The best one I have found is http://poppy.snu.ac.kr/~kchoi/class/lc_intro/fsm_imp.pdf If you have simple FSM without conditions between states, maybe you can use the last two pages of the file I have attached. I hope that your FSM is simple and you won't spend much time on doing it. In the end Ihave to add that there are no support in LOGO for designing FSM's, you just have to do it by yourself. Regards Jacekpro AttachmentState_Machine_AN.pdf (1073 Downloads) |
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