Lenze E94AxHE Servo Drives 9400 HighLine (Firmware 01-37) - Manual (Page 219)

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Firmware 1.37 - 09/2006 219
9400 HighLine | Parameter setting & configuration
Basic drive functions
Brake control | Parameter setting
9.11.1.6 Torque feedforward control
The motor control serves to precontrol the required torque of the drive when the brake is
released. Here it must be ensured that the position controller is switched off and the speed
setpoint is loaded with the actual value (no additional torque via the P component of the
speed controller).
Via C02588 it is selected whether a parameterised starting torque or the torque
memorised during the last closing operation shall be used for the feedforward control.
Feedforward control with parameterised starting torque
[9-15] Feedforward control with parameterised starting torque
Application example:
A hoist drive is to be operated with different loads. Unfortunately we do not know when
the load is available, but the starting direction (lifting or lowering) is known.
r In a no-load condition, the hoist drive needs a torque of 10 Nm. For holding the
maximum load it needs a torque of 50 Nm.
r The change-over between lifting and lowering at start-up is done via the input
BRK_bStartingTorque2.
Note!
The torque is precontrolled for one second. During this time, the actual torque
must have reached 90 % of the set torque, otherwise a fault is tripped!
n C02586 : Starting torque 1
o C02587 : Starting torque 2
p C02588 : Waiting torque source
r When C02588 = 0, a change-over
between two starting torques is
possible via input
BRK_bStartingTorque2:
– BRK_bStartingTorque2 = FALSE:
Starting torque 1 ( C02586 ) is used.
– BRK_bStartingTorque2 = TRUE:
Starting torque 2 ( C02587 ) is used.
1
0
BRK_bStartingTorque2
C02586
Œ

C02587
1
0
C02588 = 0
Ž
S&H
CTRL
Speed controller