Siemens PLCSIM addressing with Ignition Maker

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.

You have to set the gateways comm mode
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.

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.

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.

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)?

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