Lenze 9400 - Manual (Page 535)

Lenze · Servo-Inverter 9400 HighLine · Reference manual · DMS 10.0 EN · 11/2013 · TD05/06
535
11 Basic drive functions
11.12 Brake control
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11.12.2.7 Torque feedforward control via ramp function
This function extension is available from software version V3.0!
The brake control additionally offers the possibility of establishing the required torque of the drive
when the brake is released via a parameterisable ramp function.
Settings
1. Go to C02600 and set the acceleration time for the feedforward control.
2. Go to C02601 and select the reference for the acceleration time:
• Selection "0: Motor reference value":
The acceleration time refers to the generation of the motor reference torque ( C00057/2 ), i.e.
the acceleration is constant.
• Selection "1: Starting current value":
The acceleration time refers to the torque requested, i. e. the acceleration time is constant.
Sequence
[11-41] Sequence of torque feedforward control via ramp function
 Request of basic function "Speed follower"  open brake
 Torque is generated up to the setpoint via ramp function
 Brake is triggered for being opened
 After brake opening time has elapsed, the basic function "Speed follower" is activated
 C02590 : Brake opening time
t
t
Enable speed follower
t
Speed
Speed follower active
t
Œ
3
2 t
Torque
0
1
BRK_bReleaseBrakeOut