# Connections to S7-400h devices

**URL:** <https://forum.inductiveautomation.com/t/connections-to-s7-400h-devices/26344>\
**Category:** Ignition\
**Tags:** ignition79\
**Created:** [July 8, 2019, 11:40am UTC](https://forum.inductiveautomation.com/t/connections-to-s7-400h-devices/26344 "2019-07-08T11:40:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![j.abrante](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/j.abrante/32/10431_2.png) [@j.abrante](https://forum.inductiveautomation.com/u/j.abrante)\
**Post date:** [July 8, 2019, 11:40am UTC](https://forum.inductiveautomation.com/t/connections-to-s7-400h-devices/26344/1 "2019-07-08T11:40:18Z")

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Hi,  
I find to configuring ignition communication with a Siemens S7-400h, so HW redundancy. Is there a configuration procedure? In the Driver configuration I don’t see where I can put the address of the secondary PLC, that in case of lost communication with the primary PLC swith on the back-up PLC.  
Best regards

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**Author:** ![zxcslo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zxcslo/32/61610_2.png) [@zxcslo](https://forum.inductiveautomation.com/u/zxcslo)\
**Post date:** [July 8, 2019, 12:12pm UTC](https://forum.inductiveautomation.com/t/connections-to-s7-400h-devices/26344/2 "2019-07-08T12:12:37Z")

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Ignition Siemens driver doesn’t support redundancy.  
In order to achieve what you want, you must use third-party tools.  
For example this last post: [http://forum.inductiveautomation.com/t/redundant-gw-and-redundant-plc-with-kepserver-failover-opc/9628/7](http://forum.inductiveautomation.com/t/redundant-gw-and-redundant-plc-with-kepserver-failover-opc/9628/7)  
is talking about Kepware’s OPC Server Media level redundancy.  
[https://www.kepware.com/en-us/products/kepserverex/features/media-level-redundancy/](https://www.kepware.com/en-us/products/kepserverex/features/media-level-redundancy/)

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<div class="post-metadata">

**Author:** ![j.abrante](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/j.abrante/32/10431_2.png) [@j.abrante](https://forum.inductiveautomation.com/u/j.abrante)\
**Post date:** [July 8, 2019, 12:22pm UTC](https://forum.inductiveautomation.com/t/connections-to-s7-400h-devices/26344/3 "2019-07-08T12:22:47Z")

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thanks