# Real in Siemens DB **URL:** \ **Category:** Ignition\ **Tags:** ignition81\ **Created:** [December 14, 2023, 3:57am UTC](https://forum.inductiveautomation.com/t/real-in-siemens-db/83119 "2023-12-14T03:57:26Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Albin\_Auto](https://avatars.discourse-cdn.com/v4/letter/a/b2d939/32.png) [@Albin\_Auto](https://forum.inductiveautomation.com/u/Albin_Auto)\ **Post date:** [December 14, 2023, 3:57am UTC](https://forum.inductiveautomation.com/t/real-in-siemens-db/83119/1 "2023-12-14T03:57:26Z")
Hello. I'm new in Ignition and have a little problem with Siemens tag, I'm using PLC S7-1500 and Ignition Design 8.1.32. In my project there are a lot of REAL data type and I want to add to my OPC tag Ignition. But when I try to make a new tag, there are nothing REAL data type. Then I try DOUBLE and FLOAT but still not working. The error "bad\_configurationerror". I've read documentation from Ignition [Siemens - Ignition User Manual 7.9 - Ignition Documentation (inductiveautomation.com)](https://docs.inductiveautomation.com/display/DOC79/Siemens) and from this list REAL is available. But when I read [Tag Data Types - Ignition User Manual 8.1 - Ignition Documentation (inductiveautomation.com)](https://docs.inductiveautomation.com/display/DOC81/Tag+Data+Types#TagDataTypes-DocumentType) REAL is dissapear. I've followed the instruction OPC Item Path and it's work for other data type. Can anyone tell me other documentation or help me to solve this problem? Thank You. ![Screenshot 2023-12-14 102950](https://us1.discourse-cdn.com/inductiveautomation/original/3X/d/0/d0bd1388941c5290972da29dff3c17158935fb4d.png) ![Screenshot 2023-12-14 102914](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/3/e38167e40b06fdf8a16210af04e1c122a21b96f9.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:** [December 14, 2023, 6:17am UTC](https://forum.inductiveautomation.com/t/real-in-siemens-db/83119/2 "2023-12-14T06:17:41Z")
In Ignition, you choose **FLOAT** for **REAL** tags in Siemens. The syntax is correct: `[s7-1500]DB12, REAL396`. Are you sure, that in Siemens, in DB12, on offset DBD396, there's a REAL type...? ---
**Author:** ![Albin\_Auto](https://avatars.discourse-cdn.com/v4/letter/a/b2d939/32.png) [@Albin\_Auto](https://forum.inductiveautomation.com/u/Albin_Auto)\ **Post date:** [December 14, 2023, 6:20am UTC](https://forum.inductiveautomation.com/t/real-in-siemens-db/83119/3 "2023-12-14T06:20:57Z")
Thanks for your reply. Yes, my DB is 12, and data type REAL on offset 396 ---
**Author:** ![Albin\_Auto](https://avatars.discourse-cdn.com/v4/letter/a/b2d939/32.png) [@Albin\_Auto](https://forum.inductiveautomation.com/u/Albin_Auto)\ **Post date:** [December 14, 2023, 6:28am UTC](https://forum.inductiveautomation.com/t/real-in-siemens-db/83119/4 "2023-12-14T06:28:42Z")
I've try for other DB and it's work, maybe there is something in DB12 but I'm still looking for the problem. Thanks for your help ---
**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:** [December 14, 2023, 6:38am UTC](https://forum.inductiveautomation.com/t/real-in-siemens-db/83119/5 "2023-12-14T06:38:00Z")
Can you upload DB12 to PLC again? And make sure, that there is **NO** check at ' **Optimized BLock Access**' (right click on DB and Properties). ![Screenshot_142](https://us1.discourse-cdn.com/inductiveautomation/original/3X/8/d/8d19e3711496f8657286a03ff5afaeac48aa7e89.png) ---
**Author:** ![Albin\_Auto](https://avatars.discourse-cdn.com/v4/letter/a/b2d939/32.png) [@Albin\_Auto](https://forum.inductiveautomation.com/u/Albin_Auto)\ **Post date:** [December 14, 2023, 6:53am UTC](https://forum.inductiveautomation.com/t/real-in-siemens-db/83119/6 "2023-12-14T06:53:28Z")
Ah yes, it seems like I forgot about this DB, even though I had unchecked the other DB before