Torque / constant tension ACS800
Is it possible to use the ACS800 as constant tension. In other words when activated it will hold motor at constant load at variable speed and when the load is correct the rpm will go to zero and if more load motor will go to reversal with same tension
Is it possible without external signal exept "on"
It is possible. Use ACS800 with System Control firmware and set drive parameter SPC Torque Max 20.07 to required positive torque (required force mul roll diameter plus Losses torque e.g. friction torque) and SPC Torque Min 20.08 to required negative torque. Speed setpoint should be set to maximal safe speed of used drive.
In this configuration, drive speed controller will be saturated while load applied (controller output limited by SPC Torque Max value), it means drive speed will be lower then Speed setpoint. If no load is applied then drive will run at Speed Setpoint - maximal speed.
ACS800 Standard firmware has also Torque limitation after Speed controller, but there are DC voltage and Power limiter between Speed controller and Torque limiter which may influence resulting drive Torque.