# String tag communication problem **URL:** \ **Category:** Ignition\ **Created:** [April 16, 2020, 6:23pm UTC](https://forum.inductiveautomation.com/t/string-tag-communication-problem/33986 "2020-04-16T18:23:59Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![rrajatrcs](https://avatars.discourse-cdn.com/v4/letter/r/278dde/32.png) [@rrajatrcs](https://forum.inductiveautomation.com/u/rrajatrcs)\ **Post date:** [April 16, 2020, 6:23pm UTC](https://forum.inductiveautomation.com/t/string-tag-communication-problem/33986/1 "2020-04-16T18:23:59Z")
hello i have compact logix controller from allen bradelly.while reading tags from controller only string data type showing bad quality and also did’nt show its value what to do to avoid this problem? error : uncertain intial value ---
**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:** [April 16, 2020, 6:29pm UTC](https://forum.inductiveautomation.com/t/string-tag-communication-problem/33986/2 "2020-04-16T18:29:53Z")
Which driver are you using and what firmware version is the PLC? What version of Ignition? Are there any errors in the console? Is this the built-in String type or a custom length UDT? ---
**Author:** ![rrajatrcs](https://avatars.discourse-cdn.com/v4/letter/r/278dde/32.png) [@rrajatrcs](https://forum.inductiveautomation.com/u/rrajatrcs)\ **Post date:** [April 16, 2020, 6:46pm UTC](https://forum.inductiveautomation.com/t/string-tag-communication-problem/33986/3 "2020-04-16T18:46:01Z")
rs logix 5000 version 31.11. communication OPC UA server ignition version 8.0.6 erros are : uncertain intial values/ Bad Quality its a string data type of length 80 created in my MOTOR ADDON BLOCK ---
**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:** [April 16, 2020, 6:47pm UTC](https://forum.inductiveautomation.com/t/string-tag-communication-problem/33986/4 "2020-04-16T18:47:00Z")
> [@rrajatrcs](#): > > created in my MOTOR ADDON BLOCK any chance you didn't make this tag externally accessible? I think the column might even be hidden in AOIs. ---
**Author:** ![rrajatrcs](https://avatars.discourse-cdn.com/v4/letter/r/278dde/32.png) [@rrajatrcs](https://forum.inductiveautomation.com/u/rrajatrcs)\ **Post date:** [April 16, 2020, 6:49pm UTC](https://forum.inductiveautomation.com/t/string-tag-communication-problem/33986/5 "2020-04-16T18:49:47Z")
actually its shown in my tag browser and its IN/OUT parameter with Read/write enable ---
**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:** [April 16, 2020, 6:55pm UTC](https://forum.inductiveautomation.com/t/string-tag-communication-problem/33986/6 "2020-04-16T18:55:17Z")
This setting: ![image](https://us1.discourse-cdn.com/inductiveautomation/original/2X/c/c9e0a7ca3e8c8a6135467f4b542bccd4ef104429.png) And then you might find that it’s not accessible by default: ![image](https://us1.discourse-cdn.com/inductiveautomation/original/2X/e/e96fad665c488f575ce4ef8d19d3b8f1e133167e.png) ---
**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:** [April 16, 2020, 7:05pm UTC](https://forum.inductiveautomation.com/t/string-tag-communication-problem/33986/7 "2020-04-16T19:05:58Z")
> [@rrajatrcs](#): > > and its IN/OUT parameter Inout parameters do not actually become part of the AOI datatype. Just in, out, and local. ---
**Author:** ![rrajatrcs](https://avatars.discourse-cdn.com/v4/letter/r/278dde/32.png) [@rrajatrcs](https://forum.inductiveautomation.com/u/rrajatrcs)\ **Post date:** [April 16, 2020, 7:33pm UTC](https://forum.inductiveautomation.com/t/string-tag-communication-problem/33986/8 "2020-04-16T19:33:11Z")
yes but in/out/localtag only be int,sint,long ,bool etc but cannot be string data type ---
**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:** [April 16, 2020, 7:35pm UTC](https://forum.inductiveautomation.com/t/string-tag-communication-problem/33986/9 "2020-04-16T19:35:48Z")
> [@rrajatrcs](#): > > but cannot be string data type And your point? (I mean, your point as regards what Ignition should do. It seems to me this isn't an Ignition problem.) ---
**Author:** ![witman](https://avatars.discourse-cdn.com/v4/letter/w/d2c977/32.png) [@witman](https://forum.inductiveautomation.com/u/witman)\ **Post date:** [April 16, 2020, 8:49pm UTC](https://forum.inductiveautomation.com/t/string-tag-communication-problem/33986/10 "2020-04-16T20:49:36Z")
Per @pturmel’s note, you’ll need to connect Ignition to the tag you’re connecting to the in/out parameter, (not to the in/out parameter of the AOI).