Lenze DDS Function library 9300 Servo - Manual (Page 14)

Function block library Lenze9300Servo.lib
Special functions
2.1.1 Holding brake (L_BRK)
2−4
L
Lenze9300Servo.lib EN 1.1
2.1.1.3 Set controller inhibit
The controller inhhibit can, for instance, be set in the event of a fault (LU, OU).
wRelease
Time
t
t
DCTRL_bCInh_b
MCTRL_nNAct_a
bOut_b
|nNx_a|
bQSP_b
MCTRL_MAct_a MCTRL_MAct_a = nMSet
BMStore_b
t
t
t
t
Abb. 2−4 Operate brake by controller inhibit
Functional sequence
1. By setting the controller inhibit (DCTRL_bCInh_b = TRUE) bOut_b switches immediately =
TRUE.
– The drive is then braked by its mechanical brake.
2. If the controller inhibit (DCTRL_bCInh_b = FALSE) before the actual speed falls below the
threshold at nNx_a, then bOut_b = FALSE, immediately.
– The drive synchronizes itself to the momentary speed and follows its setpoint.
– If the value falls below the threshold, the drive starts.
( ^ 2−3)