I am a newbie to PLC programming.
I want to feed the output the first rung say o1 as input to the second rung I2. Is it possible to do in open plc editor. If so how??
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What you're saying doesn't make much sense. Perhaps it would be better if you start by reading the basic tutorials at https://www.openplcproject.com/reference . That will guide you through a basic ladder logic project and teach you how it works. 
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