Friends I would like to introduce logixpro 500.It is a simulator for learning Allen bradley PLC.Evaluation version is available for free download. You will get 15 days trial version .Logixoro 500 is a simulator for RSlogix 500 Allen Bradley is a leading PLC manufacturer(By Rockwell Automation). I am sure this software help beginners for learning PLC programming. You can start with small exercises.Ex: Tank filling with one pump and valve. All the best guys… You can download it from following link http://www.thelearningpit.com/lp/dwnloads.asp
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some of the other open source plc programming software
http://www.plcsimulator.org/downloads
you can learn ladder logic programming with trilog also
Ladsim is also a good one. You can interface the ladder program with HMI and you can test it
Next free PLC programming software is Eware 32. Supports Modbus too…
If you know any good software please share it…
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