# Cannot connect to Global Datablock variables from Ignition Maker

**URL:** <https://forum.inductiveautomation.com/t/cannot-connect-to-global-datablock-variables-from-ignition-maker/37188>\
**Category:** Maker\
**Tags:** ignition80\
**Created:** [July 29, 2020, 2:05pm UTC](https://forum.inductiveautomation.com/t/cannot-connect-to-global-datablock-variables-from-ignition-maker/37188 "2020-07-29T14:05:06Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jamal.muhammad.vc](https://avatars.discourse-cdn.com/v4/letter/j/6f9a4e/32.png) [@jamal.muhammad.vc](https://forum.inductiveautomation.com/u/jamal.muhammad.vc)\
**Post date:** [July 29, 2020, 2:05pm UTC](https://forum.inductiveautomation.com/t/cannot-connect-to-global-datablock-variables-from-ignition-maker/37188/1 "2020-07-29T14:05:06Z")

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Hi,

I am new to ignition but not new in this OPC-UA, PLc domain. I have configured Tags for S7-1200, S7-1500 via Kepserver. No while configuring the tags for Ignition Maker I followed several tutorials, also did the online course from Rajveer Singh. But unfortunately he shows only how to connect PLC Tags, not variables inside a Global data block. There I tried in the following way as mentioned in your online documentation: [https://docs.inductiveautomation.com/display/DOC79/Siemens](https://docs.inductiveautomation.com/display/DOC79/Siemens) , this didn’t help either. What am I doing wrong? I guess people has asked this question before, sorry for repeating. If this is a repeated question @Admin please move my question to already existing thread.

I am trying to access Offset 0(Boolean),2.0(integer) and 4.0(real) values of global Datablock instance 300. So I have used following strings in the “OPC Item Path”:  
[PLC\_node\_name]DB300.X0.0  
[PLC\_node\_name]DB300.I2.0  
[PLC\_node\_name]DB300.REAL4.0

Can anyone help?

Regards,  
Jamal

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<div class="post-metadata">

**Author:** ![chi](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@chi](https://forum.inductiveautomation.com/u/chi)\
**Post date:** [July 29, 2020, 7:14pm UTC](https://forum.inductiveautomation.com/t/cannot-connect-to-global-datablock-variables-from-ignition-maker/37188/2 "2020-07-29T19:14:37Z")

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> [@jamal.muhammad.vc](#):
>
> I have configured Tags for S7-1200, S7-1500 via Kepserver

> [@jamal.muhammad.vc](#):
>
> I tried in the following way as mentioned in your online documentation: [Siemens - Ignition User Manual 7.9 - Ignition Documentation](https://docs.inductiveautomation.com/display/DOC79/Siemens)

Are you using Kepware or Ignitions Siemens driver? For Ignitions driver, did you follow the instructions in [this knowledgebase article](https://support.inductiveautomation.com/index.php?/Knowledgebase/Article/View/29/0/connecting-to-siemens-s7-1200-and-s7-1500)?

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<div class="post-metadata">

**Author:** ![jamal.muhammad.vc](https://avatars.discourse-cdn.com/v4/letter/j/6f9a4e/32.png) [@jamal.muhammad.vc](https://forum.inductiveautomation.com/u/jamal.muhammad.vc)\
**Post date:** [July 30, 2020, 5:07am UTC](https://forum.inductiveautomation.com/t/cannot-connect-to-global-datablock-variables-from-ignition-maker/37188/3 "2020-07-30T05:07:32Z")

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I found the issue.  
To access Offset 0(Boolean),2.0(integer) and 4.0(real) values of global Datablock instance 300. Following strings in the “OPC Item Path”:  
[PLC\_node\_name]DB300,X0.0 [DB300 comma X0.0]  
[PLC\_node\_name]DB300,I2.0 [DB300 comma I2.0]  
[PLC\_node\_name]DB300,REAL4.0 [DB300 comma REAL4.0]

I was using dot(.) instead of comma (the way its done in Kepserver)