# Absolute addressing for array in siemens PLC S7-1500

**URL:** <https://forum.inductiveautomation.com/t/absolute-addressing-for-array-in-siemens-plc-s7-1500/73969>\
**Category:** Ignition\
**Tags:** ignition81, perspective\
**Created:** [May 19, 2023, 7:16pm UTC](https://forum.inductiveautomation.com/t/absolute-addressing-for-array-in-siemens-plc-s7-1500/73969 "2023-05-19T19:16:54Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![mjohnson0238](https://avatars.discourse-cdn.com/v4/letter/m/4bbf92/32.png) [@mjohnson0238](https://forum.inductiveautomation.com/u/mjohnson0238)\
**Post date:** [May 19, 2023, 7:16pm UTC](https://forum.inductiveautomation.com/t/absolute-addressing-for-array-in-siemens-plc-s7-1500/73969/1 "2023-05-19T19:16:54Z")

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I have this array that I would like to access, can I get some help on the format?

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/b/1b2d6655ee3348d89650d63fadefea008a4fa88d.png)

I know it would start like: [Doffer M18 North]DB77,(not sure here)2.0

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**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:** [May 19, 2023, 7:24pm UTC](https://forum.inductiveautomation.com/t/absolute-addressing-for-array-in-siemens-plc-s7-1500/73969/2 "2023-05-19T19:24:31Z")

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Looks like it'll be a bit ugly: [SIEMENS Driver DATE\_AND\_TIME values - #8 by chi](https://forum.inductiveautomation.com/t/siemens-driver-date-and-time-values/5198/8)

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**Author:** ![grietveld](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/grietveld/32/6984_2.png) [@grietveld](https://forum.inductiveautomation.com/u/grietveld)\
**Post date:** [May 19, 2023, 7:34pm UTC](https://forum.inductiveautomation.com/t/absolute-addressing-for-array-in-siemens-plc-s7-1500/73969/3 "2023-05-19T19:34:12Z")

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I'm struggling to find it right now, but I had found a UDT someone shared on the forum at one point to convert that. While read and write were separate tags I think it did support that as well. Let me keep digging.

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**Author:** ![grietveld](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/grietveld/32/6984_2.png) [@grietveld](https://forum.inductiveautomation.com/u/grietveld)\
**Post date:** [May 19, 2023, 7:37pm UTC](https://forum.inductiveautomation.com/t/absolute-addressing-for-array-in-siemens-plc-s7-1500/73969/4 "2023-05-19T19:37:29Z")

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Found it. Same thread just further down than I looked. The XML is the UDT. I can't remember if it worked first try or if I had to do some tweaking, but it got me where I needed to be. I'd pull a backup from my project, but I don't have time to pull the backups currently.

> [@SIEMENS Driver DATE\_AND\_TIME values](https://forum.inductiveautomation.com/t/siemens-driver-date-and-time-values/5198/21):
>
> Here you go. [Pantalla\_ejemplo\_date\_and\_time\_2019-12-27\_1520.proj](https://us1.discourse-cdn.com/inductiveautomation/original/2X/8/86d5d779f0cabd72dea62f736f79fec8808fa076.proj) (5.4 KB) [Ignition\_udt\_date\_and\_time.xml](https://us1.discourse-cdn.com/inductiveautomation/original/2X/2/2bc438550284247dc73b26a9524c55bc893f1a89.xml) (4.7 KB) It’s a DataType that has a value for reading date\_and\_time and a value for writing back to PLC. Might not be the best solution but it works (at least in my case).