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From Christofer Dutz <>
Subject Re: New utility to help inspecting unknown PLCs?
Date Mon, 15 Apr 2019 18:19:18 GMT
Just a few minutes ago in my sports course I had an idea regarding the ping ... We actually
don't have to ask for an existing address, do we? We just ask for something and if we get
an ok thats just as good as a "I have no idea what you're talking about" ... Don't you agree?


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From: Julian Feinauer <>
Sent: Monday, April 15, 2019 7:57:39 PM
Subject: AW: New utility to help inspecting unknown PLCs?

Hi Chris,

I like the idea and in fact Mathias and I already discussed a similar idea.
We have the idea to find a given value (e. G. From the hmi) and identify possible positions
in the data blocks.
I even had the idea to guess the most probable encoding for the blocks based on several measurements.

Let's dig deeper into this!


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-------- Ursprüngliche Nachricht --------
Betreff: New utility to help inspecting unknown PLCs?
Von: Christofer Dutz

Hi all,

In a phone call with a potential customer we noticed that one of the strengths of plc4x is
the ability to connect to brown field machinery.

However this usually the the problem of not having the project files or the tools to program
them at hand.

Now the idea is, that it would be great to have a tool that uses plc4x to retrieve data from
a plc with only the connection string. It could start guessing blocks and try detecting it's
size by putting until it gets an error.

As soon as that's done, it could read entire blocks and compare them with previous versions
and output diffs in order to help interpreting the operation.

What do you think?


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