# Socket connection package type question

**URL:** <https://forum.universal-robots.com/t/socket-connection-package-type-question/28047>\
**Category:** Robot Communication\
**Created:** [April 20, 2023, 4:49pm UTC](https://forum.universal-robots.com/t/socket-connection-package-type-question/28047 "2023-04-20T16:49:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![johogee](https://avatars.discourse-cdn.com/v4/letter/j/9f8e36/32.png) [@johogee](https://forum.universal-robots.com/u/johogee)\
**Post date:** [April 20, 2023, 4:49pm UTC](https://forum.universal-robots.com/t/socket-connection-package-type-question/28047/1 "2023-04-20T16:49:52Z")

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I have a UR5 CB3 robot with Polysocpe 15. I receive a package from port 30001 that is only 9 bytes long and has a package identifier 5. I see from the Primary/Secondary Client Interface manual there is a 16, 20, and 25. What is a 5?

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**Author:** ![johogee](https://avatars.discourse-cdn.com/v4/letter/j/9f8e36/32.png) [@johogee](https://forum.universal-robots.com/u/johogee)\
**Post date:** [April 20, 2023, 8:24pm UTC](https://forum.universal-robots.com/t/socket-connection-package-type-question/28047/2 "2023-04-20T20:24:16Z")

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The value of the nine bytes are 0,0,0,9,5,0,0,0,0