# Siemens NegotiatePDURequest timeout on UA 4.9.10-SNAPSHOT **URL:** \ **Category:** Ignition\ **Created:** [May 17, 2018, 12:56pm UTC](https://forum.inductiveautomation.com/t/siemens-negotiatepdurequest-timeout-on-ua-4-9-10-snapshot/18074 "2018-05-17T12:56:53Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![mazeyrat](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mazeyrat/32/10955_2.png) [@mazeyrat](https://forum.inductiveautomation.com/u/mazeyrat)\ **Post date:** [May 17, 2018, 9:40am UTC](https://forum.inductiveautomation.com/t/siemens-negotiatepdurequest-timeout-on-ua-4-9-10-snapshot/18074/1 "2018-05-17T09:40:14Z")
Hi @Kevin.Herron, I’ve upgraded the Ignition 7.9.8-beta1 with the new **OPC-UA-module** you have posted : **4.9.10-SNAPSHOT (b2018050808)** for test purpose. Since this upgrade, I’ve some error with a **Siemens S7-300** device. ```auto NegotiatePDURequest 17May2018 11:26:21 NegotiatePDURequest failed. FailureType: DISCONNECTED ConnectRequest 17May2018 11:26:21 ConnectRequest failed. FailureType: DISCONNECTED ConnectRequest 17May2018 11:26:21 ConnectRequest failed. FailureType: TIMEOUT TimeoutDaemon 17May2018 11:26:21 com.inductiveautomation.xopc.drivers.siemens.util.RequestSequence@47dd33b8 request with key "21" failed due to timeout. NegotiatePDURequest 17May2018 11:26:16 NegotiatePDURequest failed. FailureType: DISCONNECTED ConnectRequest 17May2018 11:26:16 ConnectRequest failed. FailureType: DISCONNECTED ConnectRequest 17May2018 11:26:16 ConnectRequest failed. FailureType: TIMEOUT TimeoutDaemon 17May2018 11:26:16 com.inductiveautomation.xopc.drivers.siemens.util.RequestSequence@34a14319 request with key "20" failed due to timeout. NegotiatePDURequest 17May2018 11:26:11 NegotiatePDURequest failed. FailureType: DISCONNECTED ConnectRequest 17May2018 11:26:11 ConnectRequest failed. FailureType: DISCONNECTED ConnectRequest 17May2018 11:26:11 ConnectRequest failed. FailureType: TIMEOUT TimeoutDaemon 17May2018 11:26:11 com.inductiveautomation.xopc.drivers.siemens.util.RequestSequence@47d67076 request with key "19" failed due to timeout. NegotiatePDURequest 17May2018 11:26:06 NegotiatePDURequest failed. FailureType: DISCONNECTED ConnectRequest 17May2018 11:26:06 ConnectRequest failed. FailureType: DISCONNECTED ConnectRequest 17May2018 11:26:06 ConnectRequest failed. FailureType: TIMEOUT ``` My device is a **bit special** (It’s a S7 server simulator created with snap S7 : [http://snap7.sourceforge.net/](http://snap7.sourceforge.net/)) This device was working fine with Ignition **7.9.6** and Ignition **7.9.8-beta1**. I suppose that my device don’t support PDU Negotiate request ??? **I plan to upgrade to Ignition 7.9.8 and next version. The negotiate request support will be mandatory for Siemens S7 device ???** For test purpose : **serverdemo.exe** and clientdemo.exe for windows 64-bit > **[Dropbox - File Deleted](https://www.dropbox.com/sh/1mf0qals44f31ra/AABiTCa3A16hliJKzVdezRXSa?dl=0)** > > Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Never email yourself a file again! ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [May 17, 2018, 12:34pm UTC](https://forum.inductiveautomation.com/t/siemens-negotiatepdurequest-timeout-on-ua-4-9-10-snapshot/18074/2 "2018-05-17T12:34:39Z")
> [@Node OPC-UA does not work](https://forum.inductiveautomation.com/t/node-opc-ua-does-not-work/17953/15): > > This device was working fine with Ignition 7.9.6 and Ignition 7.9.8-beta1. > I suppose that my device don't support PDU Negotiate request ??? > > I plan to upgrade to Ignition 7.9.8 and next version. The negotiate request support will be mandatory for Siemens S7 device ???? Nothing has changed, it's always been mandatory. ---
**Author:** ![mazeyrat](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mazeyrat/32/10955_2.png) [@mazeyrat](https://forum.inductiveautomation.com/u/mazeyrat)\ **Post date:** [May 17, 2018, 12:56pm UTC](https://forum.inductiveautomation.com/t/siemens-negotiatepdurequest-timeout-on-ua-4-9-10-snapshot/18074/3 "2018-05-17T12:56:53Z")
Strange…I don’t understant why my S7 device connection is not OK with the OPC-UA-module rev 4.9.10-SNAPSHOT and the error logs ??? ```auto NegotiatePDURequest 17May2018 11:26:21 NegotiatePDURequest failed. FailureType: DISCONNECTED ConnectRequest 17May2018 11:26:21 ConnectRequest failed. FailureType: DISCONNECTED ConnectRequest 17May2018 11:26:21 ConnectRequest failed. FailureType: TIMEOUT TimeoutDaemon 17May2018 11:26:21 com.inductiveautomation.xopc.drivers.siemens.util.RequestSequence@47dd33b8 request with key "21" failed due to timeout. ``` Any other idea to troubleshot this issue ? ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [May 17, 2018, 1:15pm UTC](https://forum.inductiveautomation.com/t/siemens-negotiatepdurequest-timeout-on-ua-4-9-10-snapshot/18074/4 "2018-05-17T13:15:47Z")
Not sure, it seems you’re just not getting a response. There’s a slight chance that a bug effecting any driver inheriting from `AbstractSocketDriver` (Siemens, AB) snuck into that beta release before it was reverted. If using an older build of the UA module fixes it then that may be the case. edit: looks like it’s more than a “slight” chance. I’d upgrade it to likely. ---
**Author:** ![mazeyrat](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mazeyrat/32/10955_2.png) [@mazeyrat](https://forum.inductiveautomation.com/u/mazeyrat)\ **Post date:** [May 17, 2018, 2:33pm UTC](https://forum.inductiveautomation.com/t/siemens-negotiatepdurequest-timeout-on-ua-4-9-10-snapshot/18074/5 "2018-05-17T14:33:37Z")
Thanks Kevin, my initial need was to test the fix I need for my project in 7.9.6 : Changelog 7.9.8-beta1 OPC-UA Client Fixed Upgraded Milo to 0.2.0. Improves reconnection handling of remote OPC-UA connections. So I will wait for the official release of OPC-UA module in 7.9.8 with this fix and no issue for S7 devices too. ---
**Author:** ![guganathan.r](https://avatars.discourse-cdn.com/v4/letter/g/8dc957/32.png) [@guganathan.r](https://forum.inductiveautomation.com/u/guganathan.r)\ **Post date:** [January 7, 2020, 1:40am UTC](https://forum.inductiveautomation.com/t/siemens-negotiatepdurequest-timeout-on-ua-4-9-10-snapshot/18074/6 "2020-01-07T01:40:32Z")
Hi I face the same issue. ![log](https://us1.discourse-cdn.com/inductiveautomation/original/2X/4/4a8380e9eb8839b473439b101afed2d58331cae6.jpeg) ![module](https://us1.discourse-cdn.com/inductiveautomation/original/2X/a/ad9b7d12baafadc6d09ac4a2ec2a330e791fe40e.png) Is there any solution for this? I’m able to ping S7-300 but unable to connect. ---
**Author:** ![guganathan.r](https://avatars.discourse-cdn.com/v4/letter/g/8dc957/32.png) [@guganathan.r](https://forum.inductiveautomation.com/u/guganathan.r)\ **Post date:** [January 7, 2020, 2:37am UTC](https://forum.inductiveautomation.com/t/siemens-negotiatepdurequest-timeout-on-ua-4-9-10-snapshot/18074/7 "2020-01-07T02:37:18Z")
I did try in ignition 8.0.6 trial version as well. The issue still persists. ---
**Author:** ![Inken\_Kestler](https://avatars.discourse-cdn.com/v4/letter/i/bcef8e/32.png) [@Inken\_Kestler](https://forum.inductiveautomation.com/u/Inken_Kestler)\ **Post date:** [September 5, 2024, 2:34pm UTC](https://forum.inductiveautomation.com/t/siemens-negotiatepdurequest-timeout-on-ua-4-9-10-snapshot/18074/8 "2024-09-05T14:34:22Z")
Hi, I have the same problem with a S7-1500 and Ignition 8.1.33. Several S7-1500 are connected, I can connect to all except 1. I receive the same error messages. Do you have any idea how we can fix this problem? ---
**Author:** ![Noah\_Casey](https://avatars.discourse-cdn.com/v4/letter/n/e480ec/32.png) [@Noah\_Casey](https://forum.inductiveautomation.com/u/Noah_Casey)\ **Post date:** [December 8, 2025, 2:34pm UTC](https://forum.inductiveautomation.com/t/siemens-negotiatepdurequest-timeout-on-ua-4-9-10-snapshot/18074/9 "2025-12-08T14:34:10Z")
Did you ever find a fix, I’m getting the same issue. ---
**Author:** ![Cody\_Morgan](https://avatars.discourse-cdn.com/v4/letter/c/db5fbb/32.png) [@Cody\_Morgan](https://forum.inductiveautomation.com/u/Cody_Morgan)\ **Post date:** [December 8, 2025, 3:20pm UTC](https://forum.inductiveautomation.com/t/siemens-negotiatepdurequest-timeout-on-ua-4-9-10-snapshot/18074/10 "2025-12-08T15:20:37Z")
Probably best to start a new thread and share more details, like Ignition version and logs.