# How to Trace Rated Speed of Servo motor in Mappmotion/ MappCockpit? **URL:** \ **Category:** Mechatronics & Motion\ **Tags:** mapp-cockpit, mapp-motion, automation-studio-6\ **Created:** [May 22, 2026, 11:28am UTC](https://community.br-automation.com/t/how-to-trace-rated-speed-of-servo-motor-in-mappmotion-mappcockpit/11333 "2026-05-22T11:28:44Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Hasan\_Dzulfadli](https://avatars.discourse-cdn.com/v4/letter/h/FF8800/32.png) [@Hasan\_Dzulfadli](https://community.br-automation.com/u/Hasan_Dzulfadli)\ **Post date:** [May 22, 2026, 11:28am UTC](https://community.br-automation.com/t/how-to-trace-rated-speed-of-servo-motor-in-mappmotion-mappcockpit/11333/1 "2026-05-22T11:28:44Z")
I need to trace Rated Speed of servo motor while running in mappmotion/cockpit, how do I do it? ---
**Author:** ![christoph.hilchenbac](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/christoph.hilchenbac/32/423_2.png) [@christoph.hilchenbac](https://community.br-automation.com/u/christoph.hilchenbac)\ **Post date:** [May 22, 2026, 11:34am UTC](https://community.br-automation.com/t/how-to-trace-rated-speed-of-servo-motor-in-mappmotion-mappcockpit/11333/2 "2026-05-22T11:34:45Z")
Hi, not sure what you mean with ‘tracing rated speed’ since [50: Motor: Rated speed](https://help.br-automation.com/#/en/6/ncsoftware/acp10_parameter/html/motor_speed_rated.htm) is an input parameter to the drive and therefore doesn’t change during spin. Probably you need the [251: CTRL Speed: Actual speed](https://help.br-automation.com/#/en/6/ncsoftware/acp10_parameter/html/sctrl_speed_act.htm) ? [Tracing an ACOPOS data point in the web-based HMI application](https://help.br-automation.com/#/en/6/diagnostics_support/mappcockpit/tracen_eines_acopos_datenpunktes_in_der_webbasierten_visualisierung.html) describes the handling of ACOPOS parameters with mapp Cockpit. ---
**Author:** ![Hasan\_Dzulfadli](https://avatars.discourse-cdn.com/v4/letter/h/FF8800/32.png) [@Hasan\_Dzulfadli](https://community.br-automation.com/u/Hasan_Dzulfadli)\ **Post date:** [May 22, 2026, 2:50pm UTC](https://community.br-automation.com/t/how-to-trace-rated-speed-of-servo-motor-in-mappmotion-mappcockpit/11333/3 "2026-05-22T14:50:38Z")
I need to trace the servo motor RPM while it’s running, is there a way to do it in mappcockpit/mappmotion? ---
**Author:** ![JJCosta](https://avatars.discourse-cdn.com/v4/letter/j/FF8800/32.png) [@JJCosta](https://community.br-automation.com/u/JJCosta)\ **Post date:** [May 22, 2026, 4:53pm UTC](https://community.br-automation.com/t/how-to-trace-rated-speed-of-servo-motor-in-mappmotion-mappcockpit/11333/4 "2026-05-22T16:53:39Z")
Hello, Please, check the link recommended by @christoph.hilchenbac [Tracing an ACOPOS data point in the web-based HMI application](https://help.br-automation.com/#/en/6/diagnostics_support/mappcockpit/tracen_eines_acopos_datenpunktes_in_der_webbasierten_visualisierung.html) Select SCTRL\_SPEED\_ACT as the data point instead of PCTRL\_S\_ACT and follow remaining instructions. ![image](https://europe1.discourse-cdn.com/brcommunity/original/2X/5/59d0b365c8145c23b7f2aba93d4351136a1429e8.png) You can also monitor the speed in the watch area: [Interacting with mapp components in the web-based mapp Cockpit HMI application](https://help.br-automation.com/#/en/6/diagnostics_support/mappcockpit/interaktion_mit_mapp_komponenten_in_der_webbasierten_mapp_cockpit_visualisierung.html) ![image](https://europe1.discourse-cdn.com/brcommunity/original/2X/d/d19cc43263348bec808141eac5f3fd3bebf480bc.png) ---
**Author:** ![valerio.manenti](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/valerio.manenti/32/11712_2.png) [@valerio.manenti](https://community.br-automation.com/u/valerio.manenti)\ **Post date:** [May 22, 2026, 10:56pm UTC](https://community.br-automation.com/t/how-to-trace-rated-speed-of-servo-motor-in-mappmotion-mappcockpit/11333/5 "2026-05-22T22:56:23Z")
I suspect you are trying to trace the current velocity when you spin your motor (configured as rotary axis) and you want to see exactly RPM value, so if I’m wrong forget my comment 🙂 , but if I’m correct you have to add a formula on the graph you have when you trace ParID 251 as described by Christoph. Regarding a new curve with formula based on existing signal you can follow the guidelines described by Michael in his post [Guide: Work with mapp Cockpit - Share Info & Ideas / How-To & Wikis - B&R Community](https://community.br-automation.com/t/guide-work-with-mapp-cockpit/1589) Ciao Valerio