Goals and Symptoms

For ATV71 in FVC mode and Brake Logic, how many encoder pulses will cause a Braking Speed alarm (Load mvt al)(BSA)? The user manual says there is a "fixed minimum threshold". What is the threshold?

Facts and Changes

ATV71 FVC Brake Logic

Causes and Fixes

In fact the drive translate the encoder signal into a frequency, we cannot said a encoder pulse even if there is a relation between pulse and speed.

BSA is activate in close loop when BRHB4 is set and with a threshold fixed to 0,2Hz. Furtheremore to reset BSA you have to power off the drive and power on.