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H9 ASD Installation and Operation Manual 137
Supply Voltage Correction
Program ⇒ Protection ⇒ Base Frequency Voltage
This parameter Enables/Disables the Voltage Compensation function.
When Enabled, this function provides a constant V/f ratio during periods of
input voltage fluctuations.
Settings:
0 — Disabled (Output Voltage Unlimited)
1 — Enabled (Supply Voltage Compensation)
2 — Disabled (Output Voltage Limited)
3 — Enabled (Supply Voltage Compensation w/Output Voltage Limited)
Direct Access Number — F307
Parameter Type — Selection List
Factory Default — Disabled
Changeable During Run — No
Dynamic Braking Resistance
Program ⇒ Protection ⇒ Dynamic Braking
This parameter is used to input the resistive value of the Dynamic Braking
Resistor being used.
Light-duty and Heavy-Duty resistors vary from a few ohms to several hundred
ohms. The appropriate resistance size will be typeform-
and application-
specific.
See the section titled Dynamic Braking Resistor Wire/Cable Specifications on
pg. 268 for more information on using the DBR system and for assistance in
selecting the appropriate resistor for a given application.
Note: Using a resistor value that is too low may result in system
damage.
Direct Access Number — F308
Parameter Type — Numerical
Factory Default — (ASD-dependent)
Changeable During Run — No
Minimum — 0.5
Maximum — 1000.0
Units — Ω
Continuous Dynamic Braking Capacity
Program ⇒ Protection ⇒ Dynamic Braking
This parameter is used to input the wattage of the Dynamic Braking Resistor.
See the section titled Dynamic Braking Resistor Wire/Cable Specifications on
pg. 268 for more information on using the DBR system.
Note: Using a resistor with a wattage rating that is too low may result
in system damage.
Direct Access Number — F309
Parameter Type — Numerical
Factory Default — (ASD-dependent)
Changeable During Run — No
Minimum — 0.01
Maximum — 600.00
Units — kW
Ridethrough Time
Program ⇒ Protection ⇒ Retry/Restart
In the event of a momentary power outage, this parameter determines the length
of the Ridethrough time.
The Ridethrough will be maintained for the number of seconds set using this
parameter.
See parameter F302 for more information on the Ridethrough function.
Note: The actual Ridethrough Time is load-dependent.
Direct Access Number — F310
Parameter Type — Numerical
Factory Default — 2.0
Changeable During Run — Yes
Minimum — 0.1
Maximum — 320.0
Units — Seconds
F307 F310