# Connection with RFID reader via modbus tcp

**URL:** <https://forum.inductiveautomation.com/t/connection-with-rfid-reader-via-modbus-tcp/92329>\
**Category:** Ignition\
**Created:** [June 25, 2024, 1:03pm UTC](https://forum.inductiveautomation.com/t/connection-with-rfid-reader-via-modbus-tcp/92329 "2024-06-25T13:03:42Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Adam\_Rab](https://avatars.discourse-cdn.com/v4/letter/a/53a042/32.png) [@Adam\_Rab](https://forum.inductiveautomation.com/u/Adam_Rab)\
**Post date:** [June 25, 2024, 1:03pm UTC](https://forum.inductiveautomation.com/t/connection-with-rfid-reader-via-modbus-tcp/92329/1 "2024-06-25T13:03:42Z")

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Hi everyone, it's my first post on this forum. I am a beginner.

I'm trying to connect with INVEO RFID IND2 via modbus tcp. I created connections with no errors, I made the tags in mapping but all values has value zero. Nothing else. only zero. I can't wride to values on modbus device.

I can use only port 44818 - others are blocked. I can set port 44818 on the device and in configuration in Ignition.

Where I can looking for a mistake?

![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/1/51641546ed746fac5b374b2955081239f4f73c41.png)

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/c/0c544ea54d8d4bf4e5c1bb314ead7272fc164d2d.png)

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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:** [June 25, 2024, 1:07pm UTC](https://forum.inductiveautomation.com/t/connection-with-rfid-reader-via-modbus-tcp/92329/2 "2024-06-25T13:07:28Z")

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Port 44818 is used by EtherNet/IP. It is not generally used by Modbus. Are you sure this is a Modbus device?

Can you link to the device's user manual or other documentation?

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**Author:** ![JordanCClark](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jordancclark/32/83362_2.png) [@JordanCClark](https://forum.inductiveautomation.com/u/JordanCClark)\
**Post date:** [June 25, 2024, 2:33pm UTC](https://forum.inductiveautomation.com/t/connection-with-rfid-reader-via-modbus-tcp/92329/3 "2024-06-25T14:33:36Z")

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Manual here:

> **[user\_manual\_en.pdf](https://download.inveo.com.pl/manual/ind2/user_manual_en.pdf)**
>
> 2.20 MB

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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:** [June 25, 2024, 2:54pm UTC](https://forum.inductiveautomation.com/t/connection-with-rfid-reader-via-modbus-tcp/92329/4 "2024-06-25T14:54:31Z")

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Try using explicit node addresses in your tags. Like `[D-28]1.HR2`.

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<div class="post-metadata">

**Author:** ![Adam\_Rab](https://avatars.discourse-cdn.com/v4/letter/a/53a042/32.png) [@Adam\_Rab](https://forum.inductiveautomation.com/u/Adam_Rab)\
**Post date:** [June 26, 2024, 6:22am UTC](https://forum.inductiveautomation.com/t/connection-with-rfid-reader-via-modbus-tcp/92329/5 "2024-06-26T06:22:31Z")

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> [@pturmel](#):
>
> `[D-28]1.HR2`.

with this way of description address it works the same. I can see only zeros, but I’m sure the value must be other.

> [@pturmel](#):
>
> Port 44818 is used by EtherNet/IP. It is not generally used by Modbus. Are you sure this is a Modbus device?

I must use port 44818 because others are block by other department of my company. In their opinion port 502 is dangerous.