# Siemens PLCSIM addressing with Ignition Maker

**URL:** <https://forum.inductiveautomation.com/t/siemens-plcsim-addressing-with-ignition-maker/39985>\
**Category:** Maker\
**Created:** [October 24, 2020, 6:43pm UTC](https://forum.inductiveautomation.com/t/siemens-plcsim-addressing-with-ignition-maker/39985 "2020-10-24T18:43:19Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![chijiokekechi](https://avatars.discourse-cdn.com/v4/letter/c/9dc877/32.png) [@chijiokekechi](https://forum.inductiveautomation.com/u/chijiokekechi)\
**Post date:** [October 24, 2020, 6:43pm UTC](https://forum.inductiveautomation.com/t/siemens-plcsim-addressing-with-ignition-maker/39985/1 "2020-10-24T18:43:19Z")

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Hello,  
I have connected my Siemens PLCSIM to my ignition maker, but I keep getting a Bad\_GatewayCommOff error after using the address [S7-1200]MX0.0, for a Digital Input tag addressed with M0.0 in the TIA. Please advise on what to alter in the address.  
Thank you.

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**Author:** ![chi](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@chi](https://forum.inductiveautomation.com/u/chi)\
**Post date:** [October 25, 2020, 7:41pm UTC](https://forum.inductiveautomation.com/t/siemens-plcsim-addressing-with-ignition-maker/39985/2 "2020-10-25T19:41:04Z")

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You have to set the gateways comm mode  
[https://docs.inductiveautomation.com/display/DOC80/General+Designer+Interface#GeneralDesignerInterface-ToSetorChangetheCommunicationMode](https://docs.inductiveautomation.com/display/DOC80/General+Designer+Interface#GeneralDesignerInterface-ToSetorChangetheCommunicationMode)  
How did you manage to connect plcsim to Ignition? I know that Plcsim advanced supports opc-ua but I am surprised you can connect the ‘simple’ Plcsim to an external application.

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**Author:** ![chijiokekechi](https://avatars.discourse-cdn.com/v4/letter/c/9dc877/32.png) [@chijiokekechi](https://forum.inductiveautomation.com/u/chijiokekechi)\
**Post date:** [October 25, 2020, 7:44pm UTC](https://forum.inductiveautomation.com/t/siemens-plcsim-addressing-with-ignition-maker/39985/3 "2020-10-25T19:44:27Z")

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Thank you very much Chi. I will try this out and see if it works.  
I used the NettoPlcSim app, it works like a charm.

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**Author:** ![chijiokekechi](https://avatars.discourse-cdn.com/v4/letter/c/9dc877/32.png) [@chijiokekechi](https://forum.inductiveautomation.com/u/chijiokekechi)\
**Post date:** [October 26, 2020, 8:55am UTC](https://forum.inductiveautomation.com/t/siemens-plcsim-addressing-with-ignition-maker/39985/4 "2020-10-26T08:55:10Z")

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Hello Chi,

I have tried out the solution but I got a different error message saying "Error\_Configuration.  
Please advise on how to resolve this.  
Thank you.

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**Author:** ![chi](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@chi](https://forum.inductiveautomation.com/u/chi)\
**Post date:** [October 26, 2020, 9:49am UTC](https://forum.inductiveautomation.com/t/siemens-plcsim-addressing-with-ignition-maker/39985/5 "2020-10-26T09:49:50Z")

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Your address looks right. Did you enable PUT/GET communication ([https://support.inductiveautomation.com/index.php?/Knowledgebase/Article/View/29/2/connecting-to-siemens-s7-1200-and-s7-1500](https://support.inductiveautomation.com/index.php?/Knowledgebase/Article/View/29/2/connecting-to-siemens-s7-1200-and-s7-1500))?

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<div class="post-metadata">

**Author:** ![chijiokekechi](https://avatars.discourse-cdn.com/v4/letter/c/9dc877/32.png) [@chijiokekechi](https://forum.inductiveautomation.com/u/chijiokekechi)\
**Post date:** [October 26, 2020, 12:06pm UTC](https://forum.inductiveautomation.com/t/siemens-plcsim-addressing-with-ignition-maker/39985/6 "2020-10-26T12:06:24Z")

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I just did and I also got another error: null, Uncertain\_InitialValue.  
I seem to keep getting new errors after resolving the previous ones.