User Manual of A90 Series Inverter
163
the current operating frequency of the motor, please select the appropriate mode based on
the working conditions.
If the
units place
of F04.08 is 0, tracking will be performed from the maximum
frequency. This can be applied when the operating conditions of the motor are completely
uncertain (for example, the motor is already rotating when the inverter is powered on).
If the
units place
of F04.08 is 1, tracking will be performed from the stop frequency.
This mode is usually applied.
If the
units place
of F04.08 is 2, tracking will be performed from the power frequency.
This mode can be applied during switching from the power frequency.
If the tens place of F04.08 is 0, search will be performed only in the command
direction after speed tracking is enabled. In case that the corresponding speed is not found,
the inverter will start running from the zero speed.
If the tens place of F04.08 is 1, search will be performed first in the command
direction after speed tracking is enabled and then in the opposite direction if no speed is
found.
Function
code
Function code name
Parameter
description
Unit
Default
setting
Attribute
F04.10
Deceleration time of
speed tracking
0.1 - 20.0
s
2.0
○
F04.11
Speed tracking current
30.0-150.0 (100.0 =
rated current of
inverter)
%
50.0
○
F04.12
Speed tracking
compensation gain
0.00 - 10.00
1.00
○
F04.10
: scanning speed for speed tracking from the predetermined frequency. The
duration is the time for the rated frequency to decrease to 0.00Hz.
F04.11
: current tracking, ratio to the rated current of the inverter. The lower the current,
the less the impact on the motor is, and the higher the tracking accuracy is. If the set value
is too small, the tracking result may be inaccurate, causing failure in start. The higher the
current, the less the motor speed drops. This value should be increased during heavy-load
tracking.
