# ABB Robot Web Services **URL:** \ **Category:** RobotStudio\ **Created:** [May 25, 2020, 4:47am UTC](https://tech-community.robotics.abb.com/t/abb-robot-web-services/9523 "2020-05-25T04:47:20Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![duesentrieb66](https://avatars.discourse-cdn.com/v4/letter/d/f475e1/32.png) [@duesentrieb66](https://tech-community.robotics.abb.com/u/duesentrieb66)\ **Post date:** [May 25, 2020, 4:47am UTC](https://tech-community.robotics.abb.com/t/abb-robot-web-services/9523/1 "2020-05-25T04:47:20Z")
Hello all, how can I write - e.g. a signal value - from a rapid code on the controller to a web service client (my PC)? Would I have to write a loop in my software and periodically check the value? This would produce a lot of unnecessary traffic. Or do i misunderstand something? Thanks for help! ---
**Author:** ![Maxim](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/maxim/32/4429_2.png) [@Maxim](https://tech-community.robotics.abb.com/u/Maxim)\ **Post date:** [May 25, 2020, 9:35am UTC](https://tech-community.robotics.abb.com/t/abb-robot-web-services/9523/2 "2020-05-25T09:35:11Z")
Hello, On your PC you would create a subscription (for example via Robot Web Services) to a signal in the controller. Look for information on subscriptions to signals. ---
**Author:** ![duesentrieb66](https://avatars.discourse-cdn.com/v4/letter/d/f475e1/32.png) [@duesentrieb66](https://tech-community.robotics.abb.com/u/duesentrieb66)\ **Post date:** [May 25, 2020, 10:10pm UTC](https://tech-community.robotics.abb.com/t/abb-robot-web-services/9523/3 "2020-05-25T22:10:53Z")
Thanks Maxim, I tried the example of your video (thanks for the effort!!) and they run via robotstudio. But wen I send the request to the controller I get the error: “Error: connect ECONNREFUSED”. Is this on a different port or do i need to buy the WebService option first? FTP, NFS is working fine. Thanks! ---
**Author:** ![Sample](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@Sample](https://tech-community.robotics.abb.com/u/Sample)\ **Post date:** [May 26, 2020, 1:49am UTC](https://tech-community.robotics.abb.com/t/abb-robot-web-services/9523/4 "2020-05-26T01:49:43Z")
> [@Maxim Riabichev](#): > > Hello, > > On your PC you would create a subscription (for example via Robot Web Services) to a signal in the controller. > > Look for information on subscriptions to signals. Can you give me a sample code? I tried,but it was wrong.Thank you ---
**Author:** ![Maxim](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/maxim/32/4429_2.png) [@Maxim](https://tech-community.robotics.abb.com/u/Maxim)\ **Post date:** [May 26, 2020, 8:34am UTC](https://tech-community.robotics.abb.com/t/abb-robot-web-services/9523/5 "2020-05-26T08:34:57Z")
@Sample the sample code is available on these forums. @duesentrieb66 do you have PC Interface option on your RC? ---
**Author:** ![duesentrieb66](https://avatars.discourse-cdn.com/v4/letter/d/f475e1/32.png) [@duesentrieb66](https://tech-community.robotics.abb.com/u/duesentrieb66)\ **Post date:** [May 26, 2020, 12:10pm UTC](https://tech-community.robotics.abb.com/t/abb-robot-web-services/9523/6 "2020-05-26T12:10:22Z")
Yes, I do ---
**Author:** ![duesentrieb66](https://avatars.discourse-cdn.com/v4/letter/d/f475e1/32.png) [@duesentrieb66](https://tech-community.robotics.abb.com/u/duesentrieb66)\ **Post date:** [May 26, 2020, 1:55pm UTC](https://tech-community.robotics.abb.com/t/abb-robot-web-services/9523/7 "2020-05-26T13:55:08Z")
I just scanned the ports and it looks like only 21 and 111 is open. Where would I open the port 80? There is no firewall between. laptop is directly hooked up to the RC. Thanks ---
**Author:** ![dnilsson](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/dnilsson/32/795_2.png) [@dnilsson](https://tech-community.robotics.abb.com/u/dnilsson)\ **Post date:** [June 1, 2020, 11:26am UTC](https://tech-community.robotics.abb.com/t/abb-robot-web-services/9523/8 "2020-06-01T11:26:21Z")
Solved! Error due to wrong RW installation. Webservices is only availible from RW 6.0. ---
**Author:** ![Sample](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@Sample](https://tech-community.robotics.abb.com/u/Sample)\ **Post date:** [June 3, 2020, 8:58am UTC](https://tech-community.robotics.abb.com/t/abb-robot-web-services/9523/9 "2020-06-03T08:58:50Z")
> [@](#): > > @Sample the sample code is available on these forums. > > @duesentrieb66 do you have PC Interface option on your RC? I found a subscription operation written in C# on the forum, but it is not suitable for remote mobile. I don’t see the subscription code written in javescript or HTML. Is there any corresponding code to read the subscribed data? Can you send it to me if you have it?thank you ---
**Author:** ![Maxim](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/maxim/32/4429_2.png) [@Maxim](https://tech-community.robotics.abb.com/u/Maxim)\ **Post date:** [June 3, 2020, 7:03pm UTC](https://tech-community.robotics.abb.com/t/abb-robot-web-services/9523/10 "2020-06-03T19:03:59Z")
Unfortunately there is no such code written in java or html. Perhaps you could create a new thread asking the community for assistance? ---
**Author:** ![Sample](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@Sample](https://tech-community.robotics.abb.com/u/Sample)\ **Post date:** [June 4, 2020, 1:09am UTC](https://tech-community.robotics.abb.com/t/abb-robot-web-services/9523/11 "2020-06-04T01:09:10Z")
> [@](#): > > Unfortunately there is no such code written in java or html. > Perhaps you could create a new thread asking the community for assistance? Ok, I tried to post a question