# Reading input signals

**URL:** <https://tech-community.robotics.abb.com/t/reading-input-signals/549>\
**Category:** Developer Tools\
**Created:** [November 24, 2005, 11:13am UTC](https://tech-community.robotics.abb.com/t/reading-input-signals/549 "2005-11-24T11:13:16Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Tomaz](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/tomaz/32/2751_2.png) [@Tomaz](https://tech-community.robotics.abb.com/u/Tomaz)\
**Post date:** [November 24, 2005, 11:13am UTC](https://tech-community.robotics.abb.com/t/reading-input-signals/549/1 "2005-11-24T11:13:16Z")

</div>

We have instalation with IRB 2400 for ArcWelding. I have defined 501 I/O signals on another aplication with two robots we will have even more signals. I have found next problem:

When I work in RAPID with I/O signals everithing is OK, but when I try to read I/O signals with RAB some of them is not possible to get. I found out that I can get signals on end of eio.cfg file but not signals in begining of eio.cfg file. I also change file and take some signals from begining of eio.cfg file and I put them on end. When the same signal with same declaration was in begining of file I can’t get it but when I put signal on end it was OK.