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F304-F306
Direct Access Parameter Information
W7B ASD Installation & Operation Manual
Dynamic Braking Selection
Program Protection Dynamic Braking
This parameter is model-specific and has no function on the W7B ASD.
Settings:
0 — Off
1 — On with Overload
Dynamic Braking uses the inertial energy of the load to produce a
braking force. The inertial energy of the load drives the rotor and induces
a current into the stator of the motor that may be used to reduce the bus
voltage in an attempt to preclude an over-voltage trip during deceleration.
The induced stator current (energy) is dissipated through a resistive
load. The resistive load is connected across terminals PA and PB (non-
polarized). Using a low-value, high-wattage resistance as a load for the
generated current, the resistive load dissipates the induced energy. The
dissipated energy is the energy that would otherwise have caused the
rotor to continue to rotate.
Dynamic Braking helps to slow the load quickly; it cannot act as a
holding brake.
The Dynamic Braking function may be setup and enabled by connecting
a braking resistor from terminal PA and PB of the drive and providing the
proper information at F304, F308, and F309.
Over-Voltage Limit Operation
Program Protection Stall
This parameter Enables/Disables the Over-Voltage Stall function. When
enabled, this function causes the drive to extend the decel time when the
DC bus voltage increases due to transient voltage spikes, regeneration,
supply voltage out of specification, etc., in an attempt to reduce the bus
voltage.
Settings:
0 — Enabled
1 — Disabled
2 — Enabled (Forced Shorted Deceleration)
Base Frequency Voltage 1
Program Fundamental Motor Set 1
This parameter sets the maximum value of the output voltage of the
drive. The Base Frequency Voltage 1 is the Motor 1 output voltage at the
Base Frequency (F014). Regardless of the programmed value, the
output voltage cannot be higher than the input voltage.
The actual output voltage will be influenced by the input voltage of the
ASD and the Supply Voltage Compensation setting (F307).
Note:
Not used with the W7B ASD.
108
Direct Access Number — F304
Parameter Type — Selection List
Factory Default — (ASD-Dependent)
Changeable During Run — Yes
Direct Access Number — F305
Parameter Type — Selection List
Factory Default — Enabled
Changeable During Run — Yes
Direct Access Number — F306
Parameter Type — Numerical
Factory Default — (ASD dependent)
Changeable During Run — Yes
Minimum — 0.0
Maximum — 600.0
Units — Volts
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