Yaskawa F7 Drive Programming Manual - Manual (Page 42)

Programming 34
C5-05 ASR Limit
Setting Range: 0.0 to 20.0 %
Factory Default: 5.0 %
Sets ASR frequency compensation limit as a percentage of maximum output frequency (El -04). This function is enabled when
V/f control with PG feedback is selected as the control method (A1-02).
C5-06 ASR Delay Time
Setting Range: 0.000 to 0.500 sec
Factory Default: 0.004 sec
This parameter sets the filter time constant for the time from the speed loop to the torque command output. Mechanical backlash
in an application causes secondary current (I
2
) reference variations in the motor’s rotor. This condition can prevent the adjustment
of ASR parameters. The output delay time constant is used to control these secondary current (I
2
) reference variations.
C5-07 ASR Switching Frequency
Setting Range: 0.0 to 400.0 Hz
Factory Default: 20.0 Hz
Sets frequency to change ASR proportional gain and integral time constant in units of 0.1Hz when flux vector control is selected.
Fig. 28 ASR Switching Frequency Level
Notes:
1. When C5-07 = 0, proportional gain 1 (C5-01) and integral time 1 (C5-02) are selected.
2. During V/f control with PG feedback (A1-02 = 1), the frequency switching level becomes the maximum output frequency
(E1-04).
3. The multi-function input “77: ASR Gain Switch” has priority over the ASR switch frequency (C5-07).
C5-08 ASR Integral Limit
Setting Range: 0 to 400 %
Factory Default: 400 %
Parameter C5-08 adjusts the amount of integral control of the automatic speed regulator in the Flux Vector control mode (A1-
02 = 3). Setting parameter C5-08 to zero will make the ASR control proportional. Setting C5-08 to greater than 0% will make
the ASR control proportional and sets the ASR integral upper limit as a percentage of rated torque of the connected motor.
Fig. 29 ASR Integral Limit Function
C5-07
f
FB
=
P g
ain
· I ti
me
C5-01
C5-02
C5-03
C5-04
0
P = Number of Motor Poles
N = Motor RPM
P · N
120
f
FB
Motor Speed
* When C5-07 =”0”, proportional gain 1 (C5-01)
where:
and integral time 1 (C5-02) are selected. or
E1-04
Speed
Slip
Torque
C5-08=0
P Control
C5-08=400%
P-I Control
C5-08 > 0%