# Reading tag delay in scale out architecture

**URL:** <https://forum.inductiveautomation.com/t/reading-tag-delay-in-scale-out-architecture/28568>\
**Category:** Ignition\
**Tags:** ignition80\
**Created:** [September 26, 2019, 7:43am UTC](https://forum.inductiveautomation.com/t/reading-tag-delay-in-scale-out-architecture/28568 "2019-09-26T07:43:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Neo](https://avatars.discourse-cdn.com/v4/letter/n/9fc348/32.png) [@Neo](https://forum.inductiveautomation.com/u/Neo)\
**Post date:** [September 26, 2019, 7:43am UTC](https://forum.inductiveautomation.com/t/reading-tag-delay-in-scale-out-architecture/28568/1 "2019-09-26T07:43:04Z")

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In scale-out architecture below, if I have Siemens 1500 PLC connected to Tags & I/O gateways and reading it in client launched from Front end gateway, how much delay could be there in reading the tag from PLC and displaying it on client window? Does having front end gateway adds to any delay at all?

 ![Architecture](https://us1.discourse-cdn.com/inductiveautomation/original/2X/d/de3269148b4df979537c65486e97735eeefbce49.png)