Operating instructions

Functions, monitoring, and protective functions
9.3 Drive functions
Drive converter cabinet units
314 Operating Instructions, 10/2008, A5E00288214A
also be checked to ensure that it is stable across the entire range. The dynamic response
might need to be reduced or Kp/Tn adaptation for the speed controller parameterized
accordingly.
When commissioning induction machines, you are advised to proceed as follows:
● Before connecting the load, a complete "rotating measurement" (without encoder: p1960
= 1; with encoder: p1960 = 2) should be carried out. Since the induction machine is idling,
you can expect highly accurate results for the saturation characteristic and the rated
magnetization current.
● When the load is connected, speed controller optimization should be repeated because
the total moment of inertia has changed. This is realized by selecting parameter p1960
(without encoder: p1960 = 3; with encoder: p1960 = 4).
When permanent-magnet synchronous motors are commissioned, the speed controller
should be optimized (p1960 = 2/4) when the load is connected.
Carrying out the rotating measurement (p1960 = 1, 2)
The following measurements are carried out when the enable signals are set and a switch-
on command is issued in accordance with the settings in p1959 and p1960.
● Encoder test
If a speed encoder is used, the direction of rotation and the pulse number are checked.
● Only for induction motors:
– Measurement of the magnetization characteristic (p0362 to p0369)
– Measurement of the magnetization current (p0320) and determination of the offset
voltage of the converter for offset compensation
– Measurement of the saturation of the leakage inductance and setting of the current
controller adaptation (p0391…p0393)
This is automatically activated with 1LA1 and 1LA8 motors (p0300 = 11, 18) (see
p1959.5).
● Speed controller optimization
– p1470 and p1472, if p1960 = 1 (encoderless operation)
– p1460 and p1462, if p1960 = 2 (operation with encoder)
– Kp adaptation switch-off
● Acceleration pre-control setting (p1496)
● Setting for ratio between the total moment of inertia and that of the motor (p0342)
Note
To set the new controller setting permanently, the data must be saved with p0977 or p0971
to non-volatile memory on the CompactFlash card.