# Igntion 8.1 communication with Siemens S7-1500

**URL:** <https://forum.inductiveautomation.com/t/igntion-8-1-communication-with-siemens-s7-1500/71358>\
**Category:** Ignition\
**Tags:** ignition81, vision\
**Created:** [March 21, 2023, 9:27am UTC](https://forum.inductiveautomation.com/t/igntion-8-1-communication-with-siemens-s7-1500/71358 "2023-03-21T09:27:53Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Ramakant\_Pohare](https://avatars.discourse-cdn.com/v4/letter/r/9de0a6/32.png) [@Ramakant\_Pohare](https://forum.inductiveautomation.com/u/Ramakant_Pohare)\
**Post date:** [March 21, 2023, 9:27am UTC](https://forum.inductiveautomation.com/t/igntion-8-1-communication-with-siemens-s7-1500/71358/1 "2023-03-21T09:27:53Z")

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Hello,

As per this link:  
[Siemens - Ignition User Manual 8.1 - Ignition Documentation (inductiveautomation.com)](https://docs.inductiveautomation.com/display/DOC81/Siemens), we can take only absolute address of Siemens PLC during OPC tag creation in the Designer, so instead of this Absolute address, can we take symbolic Address ? if yes how ?

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**Author:** ![m.pelagatti](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/m.pelagatti/32/68595_2.png) [@m.pelagatti](https://forum.inductiveautomation.com/u/m.pelagatti)\
**Post date:** [March 21, 2023, 9:34am UTC](https://forum.inductiveautomation.com/t/igntion-8-1-communication-with-siemens-s7-1500/71358/2 "2023-03-21T09:34:23Z")

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No, you can connect to S7-1500 enabling OPC-UA server of plc, and than read tags via OPC-UA ignition as a client.  
Read this post

> [@OPC UA struct data type?](https://forum.inductiveautomation.com/t/opc-ua-struct-data-type/26905/28):
>
> Hi at all, I have created derived opc tags as indicated, all UDT and therefore all derived tags work correctly both in reading and writing. My problem is, I created a button that via script sets 2 derived tags at the same time to value 0 within a parameterized popup: the script is as follows: if system.gui.confirm (u'Are you sure? ',' Confirm '): event.source.parent.DVC\_Popup.C\_Moff = 0 event.source.parent.DVC\_Popup.C\_Mon = 0 Only the C\_Mon tag is set …

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**Author:** ![jnqplas](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jnqplas/32/4054_2.png) [@jnqplas](https://forum.inductiveautomation.com/u/jnqplas)\
**Post date:** [August 30, 2023, 1:41pm UTC](https://forum.inductiveautomation.com/t/igntion-8-1-communication-with-siemens-s7-1500/71358/3 "2023-08-30T13:41:44Z")

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@Ramakant_Pohare

I'm wondering the same thing. Is this something that will be addressed in v8.3? Have you found any answers?