# ABB RWS Error Code 503 Issue

**URL:** <https://tech-community.robotics.abb.com/t/abb-rws-error-code-503-issue/11818>\
**Category:** Developer Tools\
**Tags:** rws\
**Created:** [March 5, 2025, 9:04am UTC](https://tech-community.robotics.abb.com/t/abb-rws-error-code-503-issue/11818 "2025-03-05T09:04:33Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![AkbulutAzizhan](https://avatars.discourse-cdn.com/v4/letter/a/e19adc/32.png) [@AkbulutAzizhan](https://tech-community.robotics.abb.com/u/AkbulutAzizhan)\
**Post date:** [March 5, 2025, 9:04am UTC](https://tech-community.robotics.abb.com/t/abb-rws-error-code-503-issue/11818/1 "2025-03-05T09:04:33Z")

</div>

Hello,

I have developed an API using the ABB RWS service to collect data from the robot. However, I have noticed that I can only send requests every 6 seconds. When I reduce the delay below 6 seconds, I receive a **503 Service Unavailable** error.

Is there any way to reduce this delay? How can I send API requests more frequently without triggering the 503 error?

**Test Results:**  
**—Delay 1000ms**

**2025-03-04T12:59:59.943Z - Success**

**{**

**“status”: “success”,**

**“manufacturer”: “ABB”,**

**“title”: “cfg”,**

**“url”: “[http://localhost:6666/rw/](http://localhost:6666/rw/)”,**

**“response”: [**

**{**

**“title”: “EIO”,**

**“value”: []**

**},**

**}**

**2025-03-04T13:00:00.944Z - Error: Request failed with status code 503**

**2025-03-04T13:00:01.944Z - Error: Request failed with status code 503**

**—Delay 1000ms**

**—Delay 6000ms**

**2025-03-05T08:42:17.831Z - Success**  
**2025-03-05T08:42:23.832Z - Success**  
**2025-03-05T08:42:29.832Z - Success**  
**{**  
**“status”: “success”,**  
**“manufacturer”: “ABB”,**  
**“title”: “cfg”,**  
**“url”: “[http://localhost:6666/rw/](http://localhost:6666/rw/)”,**  
**“response”: [**  
**{**  
**“title”: “EIO”,**  
**“value”: []**  
**},**  
**{**  
**“title”: “MMC”,**  
**“value”: []**  
**},**  
**{**  
**“title”: “MOC”,**  
**“value”: []**  
**},**  
**{**  
**“title”: “PROC”,**  
**“value”: []**  
**},**  
**{**  
**“title”: “SIO”,**  
**“value”: []**  
**},**  
**{**  
**“title”: “SYS”,**  
**“value”: []**  
**}**  
**]**  
**}**  
**—Delay 6000ms**