# B&R HMI power panel 300/400 touchglass calibration **URL:** \ **Category:** HMI & Visualization\ **Tags:** power-panel, vc4\ **Created:** [August 19, 2024, 11:21pm UTC](https://community.br-automation.com/t/b-r-hmi-power-panel-300-400-touchglass-calibration/4118 "2024-08-19T23:21:06Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![aims](https://avatars.discourse-cdn.com/v4/letter/a/FF8800/32.png) [@aims](https://community.br-automation.com/u/aims)\ **Post date:** [August 19, 2024, 11:21pm UTC](https://community.br-automation.com/t/b-r-hmi-power-panel-300-400-touchglass-calibration/4118/1 "2024-08-19T23:21:06Z")
Any body knows how to power panel 300/400 touch screen calibration ---
**Author:** ![alexander.hefner](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/alexander.hefner/32/111_2.png) [@alexander.hefner](https://community.br-automation.com/u/alexander.hefner)\ **Post date:** [August 20, 2024, 7:03am UTC](https://community.br-automation.com/t/b-r-hmi-power-panel-300-400-touchglass-calibration/4118/2 "2024-08-20T07:03:24Z")
Hi, I assume the PP300/400 uses Automation Runtime and VC4 Visual Components, right? Then, the developer has two possibilities to provide touch calibration: - using the key action [Calibrate Touch](https://help.br-automation.com/#/en/4/visualization/viscompvc4/keys/keys_keyactions_calibratetouch.html) - using the VISAPI function [VA\_StartTouchCal](https://help.br-automation.com/#/en/4/libraries%2Fvisapi%2Ffbks%2Fva_starttouchcal.html) Best regards! ---
**Author:** ![system](https://europe1.discourse-cdn.com/brcommunity/original/1X/a202d64f0f03e22a662ed33fbbca6879f1efb794.jpeg) [@system](https://community.br-automation.com/u/system)\ **Post date:** [October 11, 2024, 10:16am UTC](https://community.br-automation.com/t/b-r-hmi-power-panel-300-400-touchglass-calibration/4118/3 "2024-10-11T10:16:44Z")