# Modbus TCP - Stuck at connecting

**URL:** <https://forum.inductiveautomation.com/t/modbus-tcp-stuck-at-connecting/102013>\
**Category:** Ignition\
**Created:** [February 6, 2025, 9:40pm UTC](https://forum.inductiveautomation.com/t/modbus-tcp-stuck-at-connecting/102013 "2025-02-06T21:40:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![pprans](https://avatars.discourse-cdn.com/v4/letter/p/ac91a4/32.png) [@pprans](https://forum.inductiveautomation.com/u/pprans)\
**Post date:** [February 6, 2025, 9:40pm UTC](https://forum.inductiveautomation.com/t/modbus-tcp-stuck-at-connecting/102013/1 "2025-02-06T21:40:30Z")

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Hello All, This is my first project with Ignition. Trying to Connect Modbus PLC using Modbus TCP connection  
I am trying to connect to a MODBUS device using the following details:

- **IP Address:** 10.101.150.38
- **Registers:** 400001, 400002
- **TCP Port:** 502  
The status is changing from Disconnected to Connecting but not connected.  
Configuration is attached in the picture. Can someone please help me. Thank you!  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/8/e/8e809e16fd974f4d58fe5d50a3b5820b9cef1d17.png)

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<div class="post-metadata">

**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:** [February 6, 2025, 9:54pm UTC](https://forum.inductiveautomation.com/t/modbus-tcp-stuck-at-connecting/102013/2 "2025-02-06T21:54:53Z")

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Don't both using the address Mapping.

Just make an OPC tag and set its OPC server to the Ignition native server, and try the following as possible OPC Item Paths:

```python
[deviceName]HR1
[deviceName]1.HR1

```

If either of those work, but appear to not have the right data, you may need to play with some device advanced settings. (Zero-based addressing.)

If you then want to work with multi-register values (floats, 32-bit integers), use the manual addressing syntax for the combination you want:

> **[Modbus Addressing | Ignition User Manual](https://www.docs.inductiveautomation.com/docs/8.1/ignition-modules/opc-ua/opc-ua-drivers/modbus/modbus-addressing)**
>
> Manually Addressing a Modbus Device

You may also need to tweak the word order advanced setting on the device.