# Problem to Reading %ID value of SIEMENS S7-1500

**URL:** <https://forum.inductiveautomation.com/t/problem-to-reading-id-value-of-siemens-s7-1500/91940>\
**Category:** Ignition\
**Tags:** perspective\
**Created:** [June 17, 2024, 12:03pm UTC](https://forum.inductiveautomation.com/t/problem-to-reading-id-value-of-siemens-s7-1500/91940 "2024-06-17T12:03:17Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![sebastien\_ng](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/sebastien_ng/32/55297_2.png) [@sebastien\_ng](https://forum.inductiveautomation.com/u/sebastien_ng)\
**Post date:** [June 17, 2024, 12:03pm UTC](https://forum.inductiveautomation.com/t/problem-to-reading-id-value-of-siemens-s7-1500/91940/1 "2024-06-17T12:03:17Z")

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I would like read `%ID4` value on ignition

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/3/d/3dde1ebd39c5db6f7ce50ea7cdde1176b36eceb2.png)

I try on FactoryIO, i'am getting good value.  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/4/6463324a1fb4d4c28b6919e4bbfe9fd7009d9385.png)

In Ignition I'am reading bad value of plc

ignition config

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/3/63126ff87b2b335ca96b9dc88a9571573a62ad49.png)

maybe my syntax is not correct ? `[PLCSIM]ID4`

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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:** [June 17, 2024, 1:23pm UTC](https://forum.inductiveautomation.com/t/problem-to-reading-id-value-of-siemens-s7-1500/91940/2 "2024-06-17T13:23:15Z")

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Try `[PLCSIM]IREAL4` instead.

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<div class="post-metadata">

**Author:** ![sebastien\_ng](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/sebastien_ng/32/55297_2.png) [@sebastien\_ng](https://forum.inductiveautomation.com/u/sebastien_ng)\
**Post date:** [June 17, 2024, 2:15pm UTC](https://forum.inductiveautomation.com/t/problem-to-reading-id-value-of-siemens-s7-1500/91940/3 "2024-06-17T14:15:39Z")

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Thank you, can you recommended me a the doc who explain this syntax (Tag Simens to Ignition) please ?

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<div class="post-metadata">

**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:** [June 17, 2024, 2:15pm UTC](https://forum.inductiveautomation.com/t/problem-to-reading-id-value-of-siemens-s7-1500/91940/4 "2024-06-17T14:15:56Z")

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> **[Siemens | Ignition User Manual](https://docs.inductiveautomation.com/docs/8.1/ignition-modules/opc-ua/opc-ua-drivers/siemens#configuring-siemens-addressing)**
>
> The Siemens drivers in Ignition support basic connections to S7 devices. Ignition connects to these PLCs via TCP/IP using the S7 protocol. Similar to Modbus and some Allen Bradley connections, the Siemens S7 devices do not support tag browsing. You...