---
title: How to overcome RFID errors by using IO-LINK?
description: The RFID read/ write head's fault solution through a IO-LINK connection
---

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# How to overcome RFID errors by using IO-LINK?

## The RFID read/ write head's fault solution through a IO-LINK connection

For the read/ write head of IO-LINK, it is necessary to take the main station of IO-LINK into consideration.

![RFID安装图](https://kb.innovatingautomation.asia/hs-fs/hubfs/Knowledge%20Base/Simplified%20Chinese/Image/RFID%20%E9%AB%98%E9%A2%91/RFID%E5%AE%89%E8%A3%85%E5%9B%BE.png?width=633&name=RFID%E5%AE%89%E8%A3%85%E5%9B%BE.png)

 

When the read/ write head fails, the LED light on the read/ write head will show either a red light or no light.

![RFID支持的系统](https://kb.innovatingautomation.asia/hs-fs/hubfs/Knowledge%20Base/Simplified%20Chinese/Image/RFID%20%E9%AB%98%E9%A2%91/RFID%E6%94%AF%E6%8C%81%E7%9A%84%E7%B3%BB%E7%BB%9F.png?width=688&name=RFID%E6%94%AF%E6%8C%81%E7%9A%84%E7%B3%BB%E7%BB%9F.png)

 

If the LED light on the read-write head is behaving abnormally, then it is usually caused by the 24V power on the PIN2 pin of the read/ write head of IO-LINK. Thus, resulting in the damage of its SERVICE port.

Also the SF of the master station module connected to it will flash a red status light and give users a hint of failure.

![IO-LINK RFID](https://kb.innovatingautomation.asia/hs-fs/hubfs/Knowledge%20Base/Simplified%20Chinese/Image/RFID%20%E9%AB%98%E9%A2%91/IO-LINK%20RFID.png?width=688&name=IO-LINK%20RFID.png)

When the PORT of the corresponding master station module connected by the read/ write head of the IO-LINK lights up red light:  Please check whether the byte length of the configuration configuration is consistent with the process data length of the IO-LINK read/ write header itself.

The byte length of the configuration should be greater than or equal to the property of the read/ write header.

![RFID支持的画面](https://kb.innovatingautomation.asia/hs-fs/hubfs/Knowledge%20Base/Simplified%20Chinese/Image/RFID%20%E9%AB%98%E9%A2%91/RFID%E6%94%AF%E6%8C%81%E7%9A%84%E7%94%BB%E9%9D%A2.png?width=688&name=RFID%E6%94%AF%E6%8C%81%E7%9A%84%E7%94%BB%E9%9D%A2.png)

[Learn more about BALLUFF's tips for RFID failures that support IO-LINK](https://www.balluff.com.cn/en/cn/productfinder/#/ca/A0003/cg/G0304/product/F03406?table_page=1)

 

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