# Ignition S7 Driver vs Kepware **URL:** \ **Category:** Ignition\ **Created:** [November 20, 2018, 11:48am UTC](https://forum.inductiveautomation.com/t/ignition-s7-driver-vs-kepware/20964 "2018-11-20T11:48:06Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![valet81](https://avatars.discourse-cdn.com/v4/letter/v/c77e96/32.png) [@valet81](https://forum.inductiveautomation.com/u/valet81)\ **Post date:** [November 20, 2018, 11:48am UTC](https://forum.inductiveautomation.com/t/ignition-s7-driver-vs-kepware/20964/1 "2018-11-20T11:48:06Z")
Hello, I’ve tried to search in the forum but I couldn’t find a manual or an answer to this. For my main project I’m working on, I could reach 40-50 Siemens PLCs on my automation network in the future. At the moment I have 15 running with the standard Ignition driver and everything looks fine. I wonder if there is any official manual that says how many tags/PLCs I can connect on the Ignition S7 Driver and when it’s better to move to a Kepware driver (someone suggest me this, I’ve used it in the past for Omron PLC) ? I understand that it depends also on how you address/declare tags, if you use DBs or if you go to read bits etc. Any suggestion would be great. Thank you ---
**Author:** ![vanko25](https://avatars.discourse-cdn.com/v4/letter/v/a87d85/32.png) [@vanko25](https://forum.inductiveautomation.com/u/vanko25)\ **Post date:** [November 20, 2018, 2:10pm UTC](https://forum.inductiveautomation.com/t/ignition-s7-driver-vs-kepware/20964/2 "2018-11-20T14:10:10Z")
In the past I had 40+ Siemens S7-300s connected to ignition with thousands of tags on the default 1s poll and had no issues whatsoever using the built in S7 driver. ---
**Author:** ![valet81](https://avatars.discourse-cdn.com/v4/letter/v/c77e96/32.png) [@valet81](https://forum.inductiveautomation.com/u/valet81)\ **Post date:** [November 22, 2018, 8:40am UTC](https://forum.inductiveautomation.com/t/ignition-s7-driver-vs-kepware/20964/3 "2018-11-22T08:40:04Z")
thank you, this is very reassuring!