# Using system.opc.readValue() on a remote gateway **URL:** \ **Category:** Ignition\ **Tags:** scripting\ **Created:** [January 8, 2019, 6:43pm UTC](https://forum.inductiveautomation.com/t/using-system-opc-readvalue-on-a-remote-gateway/21748 "2019-01-08T18:43:22Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![ibrandstetter](https://avatars.discourse-cdn.com/v4/letter/i/53a042/32.png) [@ibrandstetter](https://forum.inductiveautomation.com/u/ibrandstetter)\ **Post date:** [January 8, 2019, 6:43pm UTC](https://forum.inductiveautomation.com/t/using-system-opc-readvalue-on-a-remote-gateway/21748/1 "2019-01-08T18:43:22Z")
I have a runtime/tag architecture, where the vision windows are hosted on Server1, and the tags are hosted on Server2. Server1 is connected to Server2 through the Gateway network. I would like to have a script execute from a button press that fetches tag values using system.opc.readValue(Server, Path). I know that this is possible using tag event scripts, but is there any way to do it directly from a component with this architecture? ---
**Author:** ![dkhayes117](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dkhayes117/32/68344_2.png) [@dkhayes117](https://forum.inductiveautomation.com/u/dkhayes117)\ **Post date:** [January 8, 2019, 8:30pm UTC](https://forum.inductiveautomation.com/t/using-system-opc-readvalue-on-a-remote-gateway/21748/2 "2019-01-08T20:30:46Z")
I don’t see why not… [system.opc.readValue](https://docs.inductiveautomation.com/display/DOC79/system.opc.readValue) This link is useful for future needs, I use it all the time. [scripting functions](https://docs.inductiveautomation.com/display/DOC79/Scripting+Functions) ---
**Author:** ![ibrandstetter](https://avatars.discourse-cdn.com/v4/letter/i/53a042/32.png) [@ibrandstetter](https://forum.inductiveautomation.com/u/ibrandstetter)\ **Post date:** [January 9, 2019, 3:32pm UTC](https://forum.inductiveautomation.com/t/using-system-opc-readvalue-on-a-remote-gateway/21748/3 "2019-01-09T15:32:29Z")
Thanks for the link. I suppose i should clarify that my script does work when both the vision client, and the tags are on the same gateway. My issues started when i switched over to the architecture described in the original question. From further research/testing, i believe that I would need to change my “Server” input to the scripting argument to point to the other server e.g. returnValue = system.opc.readValue(“[internal.Server2.com](http://internal.Server2.com)”, “My tag path”) I have not yet found any ignition documentation that details what to use for the “Server” input. My current best guess would be to configure a new server under: “Gateway/Configure/OPC CONNECTIONS/Servers”. I am currently gathering the hardware required to test this method, but if anyone has some insight on this issue, I would appreciate it. ---
**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:** [January 9, 2019, 3:37pm UTC](https://forum.inductiveautomation.com/t/using-system-opc-readvalue-on-a-remote-gateway/21748/4 "2019-01-09T15:37:23Z")
You would need to add an OPC connection from Server 1 to Server 2 if you wanted to use `system.opc` calls against Server 2 from Server 1. If the OPC values you’re trying to read already exist as Ignition tags in Server 2, though, you should just be using `system.tag` calls instead because you already have access to them as remote tags. ---
**Author:** ![ibrandstetter](https://avatars.discourse-cdn.com/v4/letter/i/53a042/32.png) [@ibrandstetter](https://forum.inductiveautomation.com/u/ibrandstetter)\ **Post date:** [January 9, 2019, 7:05pm UTC](https://forum.inductiveautomation.com/t/using-system-opc-readvalue-on-a-remote-gateway/21748/5 "2019-01-09T19:05:18Z")
Kevin, a quick follow up question on this topic… Do you know of a way to retrieve the path to a server from a tag provider? Essentially, I would like to be able to do something like: server = system.getServer(“A Tag Provider”). Where server would then equal: “[internal.Server2.com](http://internal.Server2.com)” Are you aware of anything that can do this? ---
**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:** [January 9, 2019, 7:08pm UTC](https://forum.inductiveautomation.com/t/using-system-opc-readvalue-on-a-remote-gateway/21748/6 "2019-01-09T19:08:08Z")
I don’t think anything like that exists. You could manually maintain a dataset tag that maps that information in 2 columns. Maybe someone else has a better idea.