# Link Ignition with Delta Simulator

**URL:** <https://forum.inductiveautomation.com/t/link-ignition-with-delta-simulator/80507>\
**Category:** Ignition\
**Created:** [October 16, 2023, 2:32am UTC](https://forum.inductiveautomation.com/t/link-ignition-with-delta-simulator/80507 "2023-10-16T02:32:25Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Sergio\_Andres\_Motta](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@Sergio\_Andres\_Motta](https://forum.inductiveautomation.com/u/Sergio_Andres_Motta)\
**Post date:** [October 16, 2023, 2:32am UTC](https://forum.inductiveautomation.com/t/link-ignition-with-delta-simulator/80507/1 "2023-10-16T02:32:25Z")

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Hi everyone. Thanks for reading me.  
I am beginning to create an OPC UA Scada linked with PLC Delta through Modbus TCP.  
I cannot acquire the signals coming from the memories and the coils. It always appears this answer with these errors:  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/a/3/a35b76d175a9d05d07d78436c9f5cd99db28ee78.png)

If I am trying to read the state of those signals, from the Ignition \* OPC Quick Client, I get this message:  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/3/53d2a99241250cf8e0160243e7391d34ef672275.png)

I don't have any idea what is wrong. The platform Designer shows a good connection between Ignition and SImulator Delta.

I registered well the Addresses Configuration for 'PlcDelta':

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/a/9/a99f0ccc2ed7403158692241fc99fee5522576be.png)  
The prefix M is related to the internal variables inside the PLC.

I am Attentive to any solution you could give me

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [October 16, 2023, 12:05pm UTC](https://forum.inductiveautomation.com/t/link-ignition-with-delta-simulator/80507/2 "2023-10-16T12:05:31Z")

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Are you sure UnitID = 0 is correct for that application? The Delta docs should say what slave unit ID is appropriate.

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**Author:** ![Sergio\_Andres\_Motta](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@Sergio\_Andres\_Motta](https://forum.inductiveautomation.com/u/Sergio_Andres_Motta)\
**Post date:** [October 17, 2023, 12:08pm UTC](https://forum.inductiveautomation.com/t/link-ignition-with-delta-simulator/80507/3 "2023-10-17T12:08:39Z")

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the reference Unit ID serves the function of differentiating the different groups of existing variables. I can have two groups of "M", I just have to difference with two different Unit ID's reference

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**Author:** ![taguililla](https://avatars.discourse-cdn.com/v4/letter/t/f9ae1b/32.png) [@taguililla](https://forum.inductiveautomation.com/u/taguililla)\
**Post date:** [August 16, 2024, 9:37am UTC](https://forum.inductiveautomation.com/t/link-ignition-with-delta-simulator/80507/4 "2024-08-16T09:37:00Z")

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Hello.

What is the ID for DVP Simulator? Did you resolve it this issue?

Thank you.  
Best regards.