C8 Factory Tuning - YASKAWA VS-616G5 Series Programming Manual

Section C: Tuning Parameters

C8 Factory Tuning

C8 Factory Tuning
This section describes parameters not normally accessed by the user, but which may require adjustment.
C8-08 Automatic Frequency Regulator Adjustment
Setting Range:
Factory Default:
Sets AFR gain in units of 0.01. When hunting is present during open loop vector control, decrease the
set value in one tenth (0.1) increments. If the speed or torque response is slow, increase the set value.
C8-09 Automatic Frequency Regulator Time Constant
Setting Range:
Factory Default:
Parameter C8-09 sets the AFR (automatic frequency regulator) time. Adjusting C8-09 will increase or
decrease the AFR frequency response, when the load changes.
If the motor is unstable, increase the set value.
If the speed response is slow, decrease the set value.
C8-30 Carrier Frequency Selection During Auto-tuning
During normal auto-tuning, the inverter is tuned while running at a carrier frequency of 2kHz. This
parameter allows the user to specify the inverter carrier frequency during auto-tuning. Adjustment may
be necessary when using a spindle motor with low inductance.
Setting
44
0.00 to 10.00
1.00
0 to 2000 milliseconds
50 milliseconds
0
Carrier frequency during auto-tuning is 2kHz (factory default).
1 Carrier frequency during auto-tuning is set by C6-01.
2 Carrier frequency is 5kHz. Except for 185-300 kW which is 2.5 kHz
AFR Gain
AFR Time
Carrier in Tune
Description
VS-616G5 Programming Manual
Open Loop Flux
V/f V/f w/PG
Vector Vector
− − −
A
− − −
A
− −
A A