# Modbus Add signal from ur script

**URL:** <https://forum.universal-robots.com/t/modbus-add-signal-from-ur-script/15242>\
**Category:** URScript\
**Created:** [July 1, 2021, 5:38pm UTC](https://forum.universal-robots.com/t/modbus-add-signal-from-ur-script/15242 "2021-07-01T17:38:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![nnagadev](https://avatars.discourse-cdn.com/v4/letter/n/82dd89/32.png) [@nnagadev](https://forum.universal-robots.com/u/nnagadev)\
**Post date:** [July 1, 2021, 5:38pm UTC](https://forum.universal-robots.com/t/modbus-add-signal-from-ur-script/15242/1 "2021-07-01T17:38:55Z")

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Hi guys

I tried to send modbus\_add\_signal command through port 30003 to create a modbus signal directly from the URCaps to connect to my PLC, but doesnt seem to work. is that approach wrong?