# Siemens un-optimized addressing.....does this even work?

**URL:** <https://forum.inductiveautomation.com/t/siemens-un-optimized-addressing-does-this-even-work/61537>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [July 5, 2022, 8:00pm UTC](https://forum.inductiveautomation.com/t/siemens-un-optimized-addressing-does-this-even-work/61537 "2022-07-05T20:00:58Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [July 5, 2022, 8:21pm UTC](https://forum.inductiveautomation.com/t/siemens-un-optimized-addressing-does-this-even-work/61537/7 "2022-07-05T20:21:08Z")

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There is a little German company that has done an _excellent_ job reverse engineering the S7 protocol, including all the bits nobody else has figured out, and has a pretty good OPC UA server for it: [OPC-Server for common PLCs](https://www.tanindustrie.de/en/Opc.php)

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