# Tag value is not the same that I have in the PLC **URL:** \ **Category:** Ignition\ **Created:** [April 23, 2024, 10:52am UTC](https://forum.inductiveautomation.com/t/tag-value-is-not-the-same-that-i-have-in-the-plc/89272 "2024-04-23T10:52:57Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Odd-Simon\_Simonsen](https://avatars.discourse-cdn.com/v4/letter/o/a88e4f/32.png) [@Odd-Simon\_Simonsen](https://forum.inductiveautomation.com/u/Odd-Simon_Simonsen)\ **Post date:** [April 23, 2024, 10:52am UTC](https://forum.inductiveautomation.com/t/tag-value-is-not-the-same-that-i-have-in-the-plc/89272/1 "2024-04-23T10:52:57Z")
My tag in Ignition shows over 1 billion. Anyone else come across this problem? ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/2/12cd91378369a2feda601597db7c568f83c4b4b0.png) ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/7/2/729117692566822408757d1cf917b165815065f7.png) ---
**Author:** ![Odd-Simon\_Simonsen](https://avatars.discourse-cdn.com/v4/letter/o/a88e4f/32.png) [@Odd-Simon\_Simonsen](https://forum.inductiveautomation.com/u/Odd-Simon_Simonsen)\ **Post date:** [April 23, 2024, 10:55am UTC](https://forum.inductiveautomation.com/t/tag-value-is-not-the-same-that-i-have-in-the-plc/89272/2 "2024-04-23T10:55:22Z")
When I change the OPC Item Path to another adress (IW) I get the expected value up. But when I use the adress (MD) I get the one billion value up. ---
**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\ **Post date:** [April 23, 2024, 11:05am UTC](https://forum.inductiveautomation.com/t/tag-value-is-not-the-same-that-i-have-in-the-plc/89272/3 "2024-04-23T11:05:22Z")
What PLC brand and model? What Ignition driver? ---
**Author:** ![Odd-Simon\_Simonsen](https://avatars.discourse-cdn.com/v4/letter/o/a88e4f/32.png) [@Odd-Simon\_Simonsen](https://forum.inductiveautomation.com/u/Odd-Simon_Simonsen)\ **Post date:** [April 23, 2024, 11:08am UTC](https://forum.inductiveautomation.com/t/tag-value-is-not-the-same-that-i-have-in-the-plc/89272/4 "2024-04-23T11:08:06Z")
Siemens S7-1500 Ignition Vision version 8.1.35 ---
**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\ **Post date:** [April 23, 2024, 11:12am UTC](https://forum.inductiveautomation.com/t/tag-value-is-not-the-same-that-i-have-in-the-plc/89272/5 "2024-04-23T11:12:27Z")
The Ignition driver should be "Siemens S7-1500". It will be configured in the gateway Config → OPC UA → Device Connections. ---
**Author:** ![Odd-Simon\_Simonsen](https://avatars.discourse-cdn.com/v4/letter/o/a88e4f/32.png) [@Odd-Simon\_Simonsen](https://forum.inductiveautomation.com/u/Odd-Simon_Simonsen)\ **Post date:** [April 23, 2024, 11:16am UTC](https://forum.inductiveautomation.com/t/tag-value-is-not-the-same-that-i-have-in-the-plc/89272/6 "2024-04-23T11:16:06Z")
Yeah it does have the correct drive ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/c/ec0f741665fd2f79a4140c7d609d65656932dff1.png) ---
**Author:** ![zxcslo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zxcslo/32/61610_2.png) [@zxcslo](https://forum.inductiveautomation.com/u/zxcslo)\ **Post date:** [April 23, 2024, 11:28am UTC](https://forum.inductiveautomation.com/t/tag-value-is-not-the-same-that-i-have-in-the-plc/89272/7 "2024-04-23T11:28:47Z")
Change the tag type from double to float. Float is 32-bit (like REAL in S7), double is 64-bit... Then use in OPC Item Path: `[plc10101]MREAL2` [https://www.docs.inductiveautomation.com/docs/8.1/ignition-modules/opc-ua/opc-ua-drivers/siemens#data-type-syntax](https://www.docs.inductiveautomation.com/docs/8.1/ignition-modules/opc-ua/opc-ua-drivers/siemens#data-type-syntax) ---
**Author:** ![Odd-Simon\_Simonsen](https://avatars.discourse-cdn.com/v4/letter/o/a88e4f/32.png) [@Odd-Simon\_Simonsen](https://forum.inductiveautomation.com/u/Odd-Simon_Simonsen)\ **Post date:** [April 23, 2024, 11:32am UTC](https://forum.inductiveautomation.com/t/tag-value-is-not-the-same-that-i-have-in-the-plc/89272/8 "2024-04-23T11:32:57Z")
I have tried that, but it doesent seem to fix the problem.. ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/2/5/2559a691faeb6fdb744635a93692f6fe84e82be9.png) ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/3/c/3c335b855b33b3afa20d40ec36e2b4100ac7b3a3.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 23, 2024, 11:58am UTC](https://forum.inductiveautomation.com/t/tag-value-is-not-the-same-that-i-have-in-the-plc/89272/9 "2024-04-23T11:58:14Z")
Your screenshot still shows `MD2` as the OPC Item path. You need to change that as @zxcslo directed. ---
**Author:** ![Odd-Simon\_Simonsen](https://avatars.discourse-cdn.com/v4/letter/o/a88e4f/32.png) [@Odd-Simon\_Simonsen](https://forum.inductiveautomation.com/u/Odd-Simon_Simonsen)\ **Post date:** [April 23, 2024, 12:02pm UTC](https://forum.inductiveautomation.com/t/tag-value-is-not-the-same-that-i-have-in-the-plc/89272/10 "2024-04-23T12:02:20Z")
Oh sorry, didnt realise! Thanks zxcslo, and thanks pturmel aswell! ---
**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 23, 2024, 12:14pm UTC](https://forum.inductiveautomation.com/t/tag-value-is-not-the-same-that-i-have-in-the-plc/89272/11 "2024-04-23T12:14:26Z")
_Pssst!_ You should mark @zxcslo's comment as the solution...