# Problem OPC tag S71500 Ignition 7.9.10 to 8.0.5

**URL:** <https://forum.inductiveautomation.com/t/problem-opc-tag-s71500-ignition-7-9-10-to-8-0-5/29783>\
**Category:** Ignition\
**Tags:** ignition79, ignition80\
**Created:** [November 8, 2019, 10:04am UTC](https://forum.inductiveautomation.com/t/problem-opc-tag-s71500-ignition-7-9-10-to-8-0-5/29783 "2019-11-08T10:04:55Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Mitchel.Gommers](https://avatars.discourse-cdn.com/v4/letter/m/2acd7d/32.png) [@Mitchel.Gommers](https://forum.inductiveautomation.com/u/Mitchel.Gommers)\
**Post date:** [November 8, 2019, 10:04am UTC](https://forum.inductiveautomation.com/t/problem-opc-tag-s71500-ignition-7-9-10-to-8-0-5/29783/1 "2019-11-08T10:04:55Z")

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Hello,

I have a problem with the OPC tags of a Siemens S71500 plc. In the first (trial) project (7.9.10) it worked perfectly, but we have bought a license and install the 8.0.5 version on our company server but there is no connection with the tag. I have export the tags in 7.9.10 and import the tags in 8.0.5. There is a connection with the OPC ua server and with the plc. It is the same plc and tag what is used in the projects but it only worked with the 7.9.10 version. I have made a screenshot.

 ![5%20opc%20tag](https://us1.discourse-cdn.com/inductiveautomation/original/2X/e/e57cd8e2ca11c12c38e26595be1e01b608d5c349.png)

Thank you,  
Mitchel Gommers

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**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:** [November 8, 2019, 12:23pm UTC](https://forum.inductiveautomation.com/t/problem-opc-tag-s71500-ignition-7-9-10-to-8-0-5/29783/2 "2019-11-08T12:23:01Z")

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Is your Ignition 8 a fresh install or an upgrade? The “OPC Server” name is wrong if it’s a fresh install.

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**Author:** ![Mitchel.Gommers](https://avatars.discourse-cdn.com/v4/letter/m/2acd7d/32.png) [@Mitchel.Gommers](https://forum.inductiveautomation.com/u/Mitchel.Gommers)\
**Post date:** [November 8, 2019, 12:40pm UTC](https://forum.inductiveautomation.com/t/problem-opc-tag-s71500-ignition-7-9-10-to-8-0-5/29783/3 "2019-11-08T12:40:39Z")

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It is a fresh install. What is the right “OPC Server” name?

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**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:** [November 8, 2019, 12:51pm UTC](https://forum.inductiveautomation.com/t/problem-opc-tag-s71500-ignition-7-9-10-to-8-0-5/29783/4 "2019-11-08T12:51:14Z")

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“Ignition OPC UA Server” without the hyphen. It subtly change between versions, unfortunately. If you did an upgrade this wouldn’t be an issue, but when you do a piecemeal tag import from a 7.9 system into a fresh 8.0 it’s kind of a “gotcha”.

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**Author:** ![Mitchel.Gommers](https://avatars.discourse-cdn.com/v4/letter/m/2acd7d/32.png) [@Mitchel.Gommers](https://forum.inductiveautomation.com/u/Mitchel.Gommers)\
**Post date:** [November 8, 2019, 1:02pm UTC](https://forum.inductiveautomation.com/t/problem-opc-tag-s71500-ignition-7-9-10-to-8-0-5/29783/5 "2019-11-08T13:02:40Z")

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Kevin thank you! It worked!