Lenze 8200 vector Instructions De Montage page 175

Switch−on sequence
14. Start the motor parameter identification (C0148)
A Ensure that the controller is inhibited
B Set C0148 = 1
C Enable the controller
If segment c becomes active again after approx. 30 s, inhibit
D
controller again.
15. Activate the motor temperature monitoring (C0119) if you have
connected a PTC or thermal contact to terminal X2.2
Lenze setting: switched off
When all settings are complete:
16. Select setpoint
17. Enable the controller
18. The drive is now running.
Optimising the vector control
In general, the vector control is ready for operation without any further measures after the
motor parameters have been identified. The vector control must only be optimised in the
case of the following drive behaviour:
Drive behaviour
Rough motor run and motor current (C0054) > 60 %
rated motor current in idle running (steady−state
operation)
Torque too low for frequencies f < 5 Hz (starting
torque)
Poor speed stability at high load (setpoint and motor
speed are no longer proportional)
Error messages OC1, OC3, OC4 or OC5 at acceleration
times (C0012) < 1 s (controller is no longer able to
follow the dynamic processes)
EDK82EV903 DE/EN/FR 5.1
Parameter setting with the XT EMZ9371BC keypad
Comment
Only when the motor is cold!
Terminal X3/28 = LOW
Press TV
l
Terminal X3/28 = HIGH
l
The identification starts:
– Segment c is off
– The motor consumes current and makes a
– The motor does not rotate!
l Terminal X3/28 = LOW
l Identification is completed.
l
Calculated and stored:
– V/f rated frequency (C0015)
– Slip compensation (C0021)
– Motor stator inductance (C0092)
l
Measured and stored:
– Motor stator resistance (C0084) = Total
Possible settings
E.g. via potentiometer at terminals 7, 8, 9
Terminal X3/28 = HIGH
If the drive does not start, additionally press u
Remedy
1. Reduce motor stator inductance (C0092) by 10 %
2. Check motor current in C0054
3. If the motor current (C0054) is > 50 % of the rated
motor current:
– Reduce C0092 until the motor current is
– Reduce C0092 by max. 20 %!
– Note: If you reduce C0092, the torque will
Increase motor resistance (C0084) or motor inductance
(C0092)
Increase slip compensation (C0021)
Overcompensation results in drive instability!
Change reset time of the I
l
Reduce C0078 = I
(more dynamic)
l
Increase C0078 = I
("smoother")
l
Commissioning
Vector control
high−pitched" tone.
resistance of motor cable and motor
(¶ 181)
approx. 50 % of the rated motor current
decrease!
controller (C0078):
max
controller becomes faster
max
controller becomes slower
max
7
175