Lenze E94AxPExxxx - Manual (Page 432)

12 Basic drive functions
12.3 Quick stop
432
Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
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12.3.4 DC-injection braking
Activate DC-injection braking
To activate DC-injection braking through the application, the bActivateDCBrake control input must
be set to TRUE.
• A change-over to the "Quick stop active" function state is effected and DC-injection braking with
the braking current set in C00974 is carried out.
Flying restart process after cancelling DC injection braking
If the flying restart mode is activated in
C00990 and DC-injection braking is cancelled, a flying
restart process is automatically started to determine the current motor speed if the following
conditions are met:
• V/f control or sensorless vector control are selected as motor control in C00006 .
• The position control structure is set to "Phase controller is active" in C02570 .
• The MI_bFlyingSyncBlocked control input of the motor interface is not assigned or set to FALSE.
• The holding brake, if available, is not applied.
12.3.4.1 DC-injection braking and flying restart process
[12-14] Process example: speed follower is active  QSP_bActivateDCBrake is active  speed follower is active

Note!
DC-injection braking is only possible if V/f control or sensorless vector control is selected
as motor control type in C00006 !
 C00974 : Braking current
t
t
Enable speed follower
t
Speed setpoint
Speed follower active
DC brake active
Œ
t
Quick stop active
t
TRUE
FALSE
bActivateDCBrake
0
1
2
3
4
Actual
speed
t
DC brake current