I've been threatening to do it for a while. I hope that this will answer some questions on how Ladder Logic works, and how you can use it.
http://www.embeddedcontrolconcepts.com/ ... dder_Logic
Note that there is a known issue with the OR conditions. This will be fixed in v3.3.
Ladder Logic docs updated
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Re: Ladder Logic docs updated
Cool. I hope to dig into it this weekend.
Re: Ladder Logic docs updated
Looks like the OR condition bug does not effect Rung0-Rung3, but does effect every group further down. At least that explains how it evaded initial beta testing.