# Siemens and Allen-Bradely PLC driver speed **URL:** \ **Category:** Ignition\ **Tags:** siemens, rockwell\ **Created:** [March 7, 2024, 1:52pm UTC](https://forum.inductiveautomation.com/t/siemens-and-allen-bradely-plc-driver-speed/86970 "2024-03-07T13:52:11Z")\ **Posts on this page:** 1\ **Showing post:** 10
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [March 8, 2024, 2:04pm UTC](https://forum.inductiveautomation.com/t/siemens-and-allen-bradely-plc-driver-speed/86970/10 "2024-03-08T14:04:23Z")
Also, are these individual elementary tags or such aliases? Or arrays or UDT instances? The fundamental unit of access/optimization is the top level tag, so 5000 individual DINTs will be **way** slower than an array of 5000 DINTs. Considering that this topic is about Siemens, the Logix discussion should probably be a new topic. But read this and the links within first: > [@Ignition & Logix Best Practice Tips for better communications](https://forum.inductiveautomation.com/t/ignition-logix-best-practice-tips-for-better-communications/60386): > > Hi All, After a whole bunch of issues I have gone down the rabbit hole of what is wrong with our setup on site. I will preface this by saying I a relatively new to all of this… so be gentle stuck_out_tongue Based on much reading(such wow) I believe I have a list of things our site could take away for a better system. Some of them are easy to implement, whilst some of them need… significant work to realize. Especially the AOI approach in point 5 expressionless Before going too far and up… --- _[View the full topic](https://forum.inductiveautomation.com/t/siemens-and-allen-bradely-plc-driver-speed/86970)._