Lenze E94AxPExxxx - Manual (Page 567)

Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
567
12 Basic drive functions
12.12 Brake control
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12.12.2.7 Torque feedforward control via ramp function
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.
Process
[12-41] 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