# Siemens S7-1200 OPC Help **URL:** \ **Category:** Maker\ **Tags:** ignition80\ **Created:** [September 28, 2020, 7:20pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-help/39139 "2020-09-28T19:20:11Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![hinton](https://avatars.discourse-cdn.com/v4/letter/h/ba8739/32.png) [@hinton](https://forum.inductiveautomation.com/u/hinton)\ **Post date:** [September 28, 2020, 7:20pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-help/39139/1 "2020-09-28T19:20:11Z")
Hey everyone, first post, so thanks for the help. I am following the manual for adding a Siemens OPC driver and cannot get the tags to communicate. The PLC OPC driver is connected. I have double-checked the address string. I did the most recent firmware update for the PLC. The tag is OPC enabled. Below are screenshots. Please let me know anything I am missing or if the OPC driver just isn’t working. Thanks. TIA Portal PLC config… ![Capture](https://us1.discourse-cdn.com/inductiveautomation/original/3X/f/2/f2949bdbeafb1a20c5c750bd790343180aa277ed.jpeg) Designer Error… ![Capture1](https://us1.discourse-cdn.com/inductiveautomation/original/3X/9/8/984e75ed6abb21b5eab4ce8eff39bb14d3fb36ba.jpeg) ![Capture5](https://us1.discourse-cdn.com/inductiveautomation/original/3X/f/7/f78022080be2773bebe722af1540f636a6d7504a.jpeg) Designer Tag Editor… ![Capture3](https://us1.discourse-cdn.com/inductiveautomation/original/3X/8/c/8c4cd39da01a9fee54e7af98f890c982c84e5a38.jpeg) TIA Portal Tag Config… ![Capture4](https://us1.discourse-cdn.com/inductiveautomation/original/3X/b/f/bf2f1178a16dcce3608197261c1528113d3d2b5a.jpeg) ---
**Author:** ![chi](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@chi](https://forum.inductiveautomation.com/u/chi)\ **Post date:** [September 28, 2020, 7:25pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-help/39139/2 "2020-09-28T19:25:12Z")
Just guessing, but your tag name is `TestInt` and in Ignition you used `IW0` instead. ---
**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:** [September 28, 2020, 7:27pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-help/39139/3 "2020-09-28T19:27:03Z")
What does the diagnostics tab for the Ignition tag say, if anything? ---
**Author:** ![NII](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nii/32/12920_2.png) [@NII](https://forum.inductiveautomation.com/u/NII)\ **Post date:** [September 28, 2020, 7:29pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-help/39139/4 "2020-09-28T19:29:56Z")
You may want to check ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/a/e/aece4a50017778cb9cd6ac61571e5a67bb2df10c.png) General\>Protection & Security\>Connection mechanisms ---
**Author:** ![hinton](https://avatars.discourse-cdn.com/v4/letter/h/ba8739/32.png) [@hinton](https://forum.inductiveautomation.com/u/hinton)\ **Post date:** [September 28, 2020, 7:31pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-help/39139/5 "2020-09-28T19:31:51Z")
![Capture6](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/4/e400b295032bf0dfe4ce44e6cbc6ff5cbc291770.jpeg) ---
**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:** [September 28, 2020, 7:35pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-help/39139/6 "2020-09-28T19:35:07Z")
Are there any errors in your logs on the gateway? ---
**Author:** ![hinton](https://avatars.discourse-cdn.com/v4/letter/h/ba8739/32.png) [@hinton](https://forum.inductiveautomation.com/u/hinton)\ **Post date:** [September 28, 2020, 7:37pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-help/39139/7 "2020-09-28T19:37:13Z")
This was the correct answer. Thanks everyone! ---
**Author:** ![hinton](https://avatars.discourse-cdn.com/v4/letter/h/ba8739/32.png) [@hinton](https://forum.inductiveautomation.com/u/hinton)\ **Post date:** [September 28, 2020, 7:37pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-help/39139/8 "2020-09-28T19:37:40Z")
No, it was the checkbox in TIA Portal. Thanks for your help. ---
**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:** [September 28, 2020, 7:38pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-help/39139/9 "2020-09-28T19:38:17Z")
There’s a couple other limitations to be aware of: [https://support.inductiveautomation.com/index.php?/Knowledgebase/Article/View/29/0/connecting-to-siemens-s7-1200-and-s7-1500](https://support.inductiveautomation.com/index.php?/Knowledgebase/Article/View/29/0/connecting-to-siemens-s7-1200-and-s7-1500) ---
**Author:** ![hinton](https://avatars.discourse-cdn.com/v4/letter/h/ba8739/32.png) [@hinton](https://forum.inductiveautomation.com/u/hinton)\ **Post date:** [September 28, 2020, 7:38pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-help/39139/10 "2020-09-28T19:38:57Z")
Very good to know. Thanks. ---
**Author:** ![lganson](https://avatars.discourse-cdn.com/v4/letter/l/a5b964/32.png) [@lganson](https://forum.inductiveautomation.com/u/lganson)\ **Post date:** [February 8, 2021, 9:19pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-help/39139/11 "2021-02-08T21:19:17Z")
Kevin, the link seems to broken. Will you verify the link is good? Thanks. ---
**Author:** ![Paul.Scott](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul.scott/32/4578_2.png) [@Paul.Scott](https://forum.inductiveautomation.com/u/Paul.Scott)\ **Post date:** [February 8, 2021, 9:28pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-help/39139/12 "2021-02-08T21:28:29Z")
The article was moved to our new help center. You can find it here: [https://support.inductiveautomation.com/hc/en-us/articles/360047576831-Connecting-to-Siemens-S7-1200-and-S7-1500](https://support.inductiveautomation.com/hc/en-us/articles/360047576831-Connecting-to-Siemens-S7-1200-and-S7-1500)