# Modbus RTU - readnig register

**URL:** <https://forum.inductiveautomation.com/t/modbus-rtu-readnig-register/56514>\
**Category:** Ignition\
**Tags:** ignition80, vision\
**Created:** [February 24, 2022, 2:47pm UTC](https://forum.inductiveautomation.com/t/modbus-rtu-readnig-register/56514 "2022-02-24T14:47:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Typical\_user](https://avatars.discourse-cdn.com/v4/letter/t/f1d935/32.png) [@Typical\_user](https://forum.inductiveautomation.com/u/Typical_user)\
**Post date:** [February 24, 2022, 2:47pm UTC](https://forum.inductiveautomation.com/t/modbus-rtu-readnig-register/56514/1 "2022-02-24T14:47:01Z")

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Coul you help me with modbus connection configuration for variables taking up 2 addresses?  
I tried different configurations but nothing works.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/f/3/f3e5556a335671bb317d2628be2a1ea8d849bbf3.png)

![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/f/2/f2ab27533c589f8f4b1f5daf6a6aa4454a8b3cd6.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 24, 2022, 3:46pm UTC](https://forum.inductiveautomation.com/t/modbus-rtu-readnig-register/56514/2 "2022-02-24T15:46:51Z")

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Try

```auto
[someDevice]IRI1
[someDevice]IRI3
[someDevice]IRI5
[someDevice]IRI7
[someDevice]IRI9

```

See the documentation for the various conversion options. You might need to set the driver to swap words. And/or include a node number prefix.

[https://docs.inductiveautomation.com/display/DOC80/Modbus+Addressing#ModbusAddressing-ToManuallyCreateanAddressforaSingleTag](https://docs.inductiveautomation.com/display/DOC80/Modbus+Addressing#ModbusAddressing-ToManuallyCreateanAddressforaSingleTag)

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<div class="post-metadata">

**Author:** ![Typical\_user](https://avatars.discourse-cdn.com/v4/letter/t/f1d935/32.png) [@Typical\_user](https://forum.inductiveautomation.com/u/Typical_user)\
**Post date:** [February 24, 2022, 7:51pm UTC](https://forum.inductiveautomation.com/t/modbus-rtu-readnig-register/56514/3 "2022-02-24T19:51:37Z")

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Thanks @pturmel !  
So, this is what helped me in the end:  
slave = 8  
address = 1  
32bit, 2 length  
tag editor:  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/8/184c72b00cca8031a378783aed48b29cdbb2cbe5.png)

opc server settings:  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/1/1114e9d7a6d451c835307140e8e3a06e35af2e59.png)

It’s little bit strange because i tried this earlier but it’s good that things are working now