Lenze E94AxPExxxx - Manual (Page 559)

Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
559
12 Basic drive functions
12.12 Brake control
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
12.12.2.4 Brake activation in automatic operation
Brake activation through N < N
min
[12-33] Process of brake activation through N < Nmin

Tip!
The value in
C02581 should be set to approx. 5 ... 20 % of the maximum speed to minimise
the wear of the brake and also provide for an optimum braking behaviour by a low grinding
of the brake.
 Speed setpoint
 Actual speed value
 C02581 : Brake activation threshold
• If the motor speed falls below the
threshold for brake activation set in
C02581 , the function "Close brake" is
activated in the automatic operation
(mode 2/12).
• Here only the absolute value of the motor
speed is considered, the direction of
rotation remains unconsidered.
• In manual operation (mode 1/11) C02581
has no function.
t
t
Œ
t
0 1
n
Standstill
BRK_bReleaseBrakeOut
t
Stopping