# Ignition 7.99 and Siemens PLC

**URL:** <https://forum.inductiveautomation.com/t/ignition-7-99-and-siemens-plc/26583>\
**Category:** General Discussion\
**Created:** [July 16, 2019, 1:18pm UTC](https://forum.inductiveautomation.com/t/ignition-7-99-and-siemens-plc/26583 "2019-07-16T13:18:12Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Apedolzky](https://avatars.discourse-cdn.com/v4/letter/a/f04885/32.png) [@Apedolzky](https://forum.inductiveautomation.com/u/Apedolzky)\
**Post date:** [July 16, 2019, 1:18pm UTC](https://forum.inductiveautomation.com/t/ignition-7-99-and-siemens-plc/26583/1 "2019-07-16T13:18:12Z")

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Hello togehter,

we are using Ignition 7.99 since a few months.  
We have there some PLC 300 and PLC1500 from Siemens in the Project.  
Since a few days we get an error in the Log-File and we don’t know how to handle.

 ![Error%20Ignition_1](https://us1.discourse-cdn.com/inductiveautomation/original/2X/6/6fce4e2d0c6395928b4e234d3efc16a1b8484e5c.png)  
In my mind i knew “optimized AdressBlock” is used in 1200 and 1500 PLC’s not in S7-300.  
In the Message i could not indentify which PLC brings the error.  
How can we find the Problem ?  
Some sugestions ?  
Thanks  
Andreas