# Siemens tag address syntax in OPC Item Path **URL:** \ **Category:** Ignition\ **Created:** [July 29, 2024, 6:08pm UTC](https://forum.inductiveautomation.com/t/siemens-tag-address-syntax-in-opc-item-path/93856 "2024-07-29T18:08:57Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Phil\_Richardson](https://avatars.discourse-cdn.com/v4/letter/p/e47c2d/32.png) [@Phil\_Richardson](https://forum.inductiveautomation.com/u/Phil_Richardson)\ **Post date:** [July 29, 2024, 6:08pm UTC](https://forum.inductiveautomation.com/t/siemens-tag-address-syntax-in-opc-item-path/93856/1 "2024-07-29T18:08:57Z")
OPC Item Path - ns=1;s=[Packer]DB20,DBW100 is not getting the tag data from the Siemens S7-1500. Device Connections - The Siemens S7 shows Connected Siemens Rack 0, slot 0 S7 Tag address - %DB20.DBW100 (INT) Tried Data types W, I, D, DI, and DBW more system info: the PLC IP address is on a different subnet from the the Ignition server so the connection is thru an Edge Router X. Ignition version 7.9 The Ignition driver adds the port 102 Port forwarding in the router does not include the :102 Tag Quality shows Bad or Error Configuration thank you for solution suggestions ---
**Author:** ![Phil\_Richardson](https://avatars.discourse-cdn.com/v4/letter/p/e47c2d/32.png) [@Phil\_Richardson](https://forum.inductiveautomation.com/u/Phil_Richardson)\ **Post date:** [August 30, 2024, 11:01pm UTC](https://forum.inductiveautomation.com/t/siemens-tag-address-syntax-in-opc-item-path/93856/2 "2024-08-30T23:01:48Z")
no responses?!?!?! Is it the router config, PLC comm setup or the Ignition S7driver? ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [August 30, 2024, 11:05pm UTC](https://forum.inductiveautomation.com/t/siemens-tag-address-syntax-in-opc-item-path/93856/3 "2024-08-30T23:05:31Z")
> [@Phil\_Richardson](#): > > ns=1;s=[Packer]DB20,DBW10 I would guess this should be `ns=1;s=[Packer]DB20,W10`, based on the format described in IA's manual. BTW: > [@Phil\_Richardson](#): > > no responses?!?!?! This is a volunteer forum, not official IA support. If you want an assured response, open a support ticket. ---
**Author:** ![Phil\_Richardson](https://avatars.discourse-cdn.com/v4/letter/p/e47c2d/32.png) [@Phil\_Richardson](https://forum.inductiveautomation.com/u/Phil_Richardson)\ **Post date:** [August 31, 2024, 12:44am UTC](https://forum.inductiveautomation.com/t/siemens-tag-address-syntax-in-opc-item-path/93856/4 "2024-08-31T00:44:11Z")
make sure your Siemens PLC has the box checked for Activate OPC UA Client! ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [August 31, 2024, 2:03am UTC](https://forum.inductiveautomation.com/t/siemens-tag-address-syntax-in-opc-item-path/93856/5 "2024-08-31T02:03:20Z")
> [@Phil\_Richardson](#): > > Activate OPC UA Client! ? Are you not using IA's own driver? (That's what your OPC Item Path looks like.) ---
**Author:** ![Phil\_Richardson](https://avatars.discourse-cdn.com/v4/letter/p/e47c2d/32.png) [@Phil\_Richardson](https://forum.inductiveautomation.com/u/Phil_Richardson)\ **Post date:** [August 31, 2024, 3:07pm UTC](https://forum.inductiveautomation.com/t/siemens-tag-address-syntax-in-opc-item-path/93856/6 "2024-08-31T15:07:02Z")
The machine builder did not check the Activate OPC UA Client checkbox in TIA Portal. I discovered it after installing trial version of TIA. Been troubleshooting this for weeks. Nobody here knew enough about Ignition and Siemens. Thanks Phil, Phil ---
**Author:** ![lrose](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/lrose/32/62724_2.png) [@lrose](https://forum.inductiveautomation.com/u/lrose)\ **Post date:** [August 31, 2024, 3:43pm UTC](https://forum.inductiveautomation.com/t/siemens-tag-address-syntax-in-opc-item-path/93856/7 "2024-08-31T15:43:39Z")
You may not want, what appears to be a phone number available to the public. So might want to edit the post and remove that. One of the reasons I don't reply via email. ---
**Author:** ![Phil\_Richardson](https://avatars.discourse-cdn.com/v4/letter/p/e47c2d/32.png) [@Phil\_Richardson](https://forum.inductiveautomation.com/u/Phil_Richardson)\ **Post date:** [September 3, 2024, 3:17pm UTC](https://forum.inductiveautomation.com/t/siemens-tag-address-syntax-in-opc-item-path/93856/8 "2024-09-03T15:17:10Z")
thank you