GX9 ASD Installation and Operation Manual 161
Voltage Compensation Coefficient for Dead Time
Program Special Special Parameters
This parameter adjusts the degree of voltage compensation during dead time by
increasing or decreasing the on-time of the programmed PWM just prior to the
start of the dead time.
Direct Access Number — F488
Parameter Type — Numerical
Factory Default — (ASD-Dependent)
Changeable During Run — Yes
Minimum — 0.00
Maximum — 327.67
Dead Time Compensation
Program Special Special Parameters
This parameter Enables/Disables the Dead Time Compensation function. The
Dead Time Compensation feature provides a smoothing of the on-off IGBT
signal that feeds the Gate Driver board during the off portion of the on-off
cycle.
Settings:
0 — Enabled
1 — Disabled
Direct Access Number — F489
Parameter Type — Selection List
Factory Default — Enabled
Changeable During Run — Yes
Dead Time Compensation Bias
Program Special Special Parameters
This parameter sets a bias for the Dead-time Compensation function. The
Dead-time Compensation feature provides a smoothing of the on-off IGBT
signal that feeds the Gate Driver board.
Direct Access Number — F490
Parameter Type — Numerical
Factory Default — (ASD-Dependent)
Changeable During Run — Yes
Minimum — -32768
Maximum — 32767
Switching Frequency Between Current and Voltage Control
Program Special Special Parameters
This parameter sets the threshold frequency at which ASD control is switched
between Current control and Voltage control.
Direct Access Number — F491
Parameter Type — Numerical
Factory Default — 40.00
Changeable During Run — Yes
Minimum — 10.00
Maximum — 60.00
Unit — Hz
Acceleration Time 2
Program Special Accel/Decel (1 – 4) Settings
This parameter specifies the time in seconds for the output of the ASD to go
from 0.0 Hz to the Maximum Frequency for the 2 Acceleration profile. The
Accel/Decel pattern may be set using F502. The minimum Accel/Decel time
may be set using F508.
This setting may be adjusted to stabilize unstable Virtual Linear Pump
operation.
This setting is also used to determine the acceleration rate of the UP/DOWN
Frequency Functions.
Note: An acceleration time shorter than the load will allow may cause
nuisance tripping and mechanical stress to loads. Automatic
Accel/Decel, Stall, and Ridethrough settings may lengthen the
acceleration times.
Direct Access Number — F500
Parameter Type — Numerical
Factory Default — (ASD-Dependent)
Changeable During Run — Yes
Minimum — Acc/Dec Lower Limit
(F508)
Maximum — 6000.00
Units — Seconds
F488 F500
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