MS05k. [Siemens S120 #9] SINAMICS S120 Drive Torque Limitation, Torque Reduction

[@vatsalthaker2122]

Thanks for this amazing video series

[@electricalautomation]

Glad you enjoy it!

[@vatsalthaker2122]

@@electricalautomation one suggestion...after this please make one series on structured way logic development

[@electricalautomation]

@@vatsalthaker2122 Do you mean ST structure Text/ SCL programming?

[@vatsalthaker2122]

@@electricalautomation yupp with good examples

[@elbekayecheikhsidelmokhtar5889]

Thanks 🙏

[@bhagyodayasinghjadhav]

Great 👍

[@electricalautomation]

Thank you 👍

[@ahsanahmad2121]

can i have the project please? i'm searching a torque control with V90 siemens

[@francisgremillet3894]

Ok, great tuto! But you Said THOT torque l’imitions is generally used in speed control mode. So how to set torque limitation in a positionning task and avoid overspeed while deactivating torque limiting after axis have reached the target position?

[@electricalautomation]

From the application wise, it is rare to use position control with torque reduction. Because if you limit the torque, some times your position close loop cannot work properly anymore because the drive does not have enough torque to reach the position target. In addition, you could check the 'Fix Stop' function, which allows the positioning control to work together with torque limiting for torque tightening control.

[@francisgremillet3894]

Thank for answering. I’m not 100% on line with you regarding no torque limitation in positioning loop. I’m often facing such situation while setting up special machines. The motor nominal torque can be higher than system required torque to accelerate a mechanism. And to avoid damages or injuries somme times I have to limit torque while positioning.

[@electricalautomation]

@@francisgremillet3894 To avoid damage, you could use speed override from Power_ON, to reduce speed to

[@TechSri1]

Sir.. How to determine the toque limit of each motor?

[@electricalautomation]

Good questions! Basically two ways: #1 math calculation. e.g. In converting project, we can calculate acc and inertia, as well as the winder diameter and web force to define a 'max' (no breaking web) torque. #2, using torque curve to monitor the torque for the regular control, then set the torque limit to be 10% higher as the limit.

[@basararkan2216]

Hello, Thats a great video, thank you. But im using simatic manager and starter in a factory. Torque limits go from plc to drive as %150(p1522,1523) Sometimes the actual speed cant reach referance speed. Starter says 'torque limite reached'.i look actual torque but it shows %60-70, but the limit %150...Also i check the current , there is no problem, current is lower than nominal . i carried search in starter, and i realized that there is a parameter r1538(effective torque limit). This value always changes when motor running. İf actual torque is higher than r1538, the motor cant be speeder. My question is; how do r1538(effective torq limit) change? İ want to let the motor can be speeder until actual torque %150.. Thank you very much!

[@electricalautomation]

Please check p2003, some times the default S120 p2003 is the 200% of the default torque