Section V Parameter Function Table
40
start track state
power down track state
speed search
frequency conversion
power frequency
power down
control
motor
rotate
speed
output
frequency
output
frequency
motor
rotate
speed
input
power
A11
This parameter is used to select the inverter tracking mode.
0 : N speed tracking means to start tracking from 0 Hz.
1 : Power-down tracking
When the inverter instantaneous power off and re-start, the motor will continue running with
current speed and direction.
If the power off time is longer than A11 set time, the inverter will not re-start power on
again.
2 : Startup tracking mode
When power on, inverter will first inspect motor direction and speed, and then driving motor
with current speed and direction.
Set startup tracking function, power off tracking function is still valid.
Power down frequency drop
point
65~100%(standard DC bus
voltage)
Power down frequency drop
time
Correctly setting this parameter can let inverter does not less voltage stop in case of
instantaneous power off.
When the DC bus voltage drop to frequency drop point A12 set, inverter will decelerate
according to deceleration time A13 set and stop outputting power to load. Meanwhile, inverter
will use load feedback energy to compensate DC bus voltage dropping and keep inverter working
in short time.
Power down frequency drop time actually is deceleration time of frequency dropping after
power off.
If this value set is too large, the load feedback energy is small, then inverter can not
compensate for voltage dropping in DC.
If this value set is too small and there is large energy feedback from load, the excessive
energy compensation may cause inverter over-voltage fault.
Set A12 100% to cancel power off frequency dropping function.
Limit deceleration protection
Point
Limit fix-speed protection
point
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