Lenze 4800 - Selection of Direction of Rotation and Quick Stop

Commissioning
5-6
48XX/49XXSHB0399
5.4 Selection of direction of rotation and quick stop
Direction of rotation
The polarity of the output voltage V
A
and thus the direction of rotation of the motor
depends on the signs of the setpoint, the control of the digital inputs X2/21 and
X2/22, and the polarity of the field voltage.
Quick stop (QSP)
Independently of the setpoint selection and because of the quick stop function, the
controller can be stopped within a time selectable under C105.
( The quick stop function is active:
- when the mains is switched on, if X2/21= HIGH and X2/22 = HIGH
- during operation with X2/21 = LOW and X2/22 = LOW
The speed is reduced to zero within the deceleration time set under C105.
( Quick stop
- sets the additional setpoint integrator to 0.
- decelerates the drive to 0 according to the deceleration ramp set under
C105.
- is detected internally if no signal has been applied to X2/21, X2/22 for
more than approx. 6 ms.
( The drive starts running again
- if a HIGH signal is applied to one of the inputs (also for keypad or interface
operation).
1
0
1
0
1
0
CCW
CW
QSP
21
4900Str027
FIG 5-3 Selection of direction of rotation
¥ CW/CCW not overlapping
¦ CW/CCW overlapping
When the threshold n
act
= 0 (C019) is reached, the integral action component of
the speed controller will be switched off (only if C005 = -10-, -11-, -40-, -41-). With
all other configurations, the I-component of the n-controller will only be switched
off, if the angle controller is not active (C254 = 0). The drive cannot generate a
torque when stopped by a brake.
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