F242 | F251 | |
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Run Frequency Hysteresis | Direct Access Number — F242 | |
Program ⇒ Special ⇒ Frequency Control | Parameter Type — Numerical | |
This parameter provides a | Factory Default — 0.00 | |
Changeable During Run — Yes | ||
(F241). | ||
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| Minimum — 0.00 | |
| Maximum — 30.0 | |
| Units — Hz |
End Frequency
Program ⇒ Special ⇒ Frequency Control
This parameter sets the lowest frequency that the drive will recognize during deceleration before the drive goes to 0.0 Hz.
Direct Access Number — F243
Parameter Type — Numerical
Factory Default — 0.00
Changeable During Run — Yes
Minimum — 0.00
Maximum — 30.0
Units — Hz
0 Hz Dead Band Signal
Program ⇒ Special ⇒ Special Parameters
This parameter sets an output frequency threshold that, until the commanded frequency surpasses this setting, the ASD will output 0 Hz to the motor.
This setting will override the Start Frequency setting (F240) if this setting has a higher value.
Direct Access Number — F244
Parameter Type — Numerical
Factory Default — 0.00
Changeable During Run — Yes
Minimum — 0.00
Maximum — 5.00
Units — Hz
DC Injection Braking Start Frequency | Direct Access Number — | F250 |
Program ⇒ Protection ⇒ DC Braking | Parameter Type — Numerical | |
During deceleration this is the frequency at which DC Injection braking will | Factory Default — 0.00 |
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start. | Changeable During Run — Yes | |
DC Injection Braking | Minimum — 0.00 |
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DC Injection Braking is a braking system used with | Maximum — 120.00 |
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Units — Hz |
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Unlike conventional brakes, there is no physical contact between the rotating |
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shaft and a stationary brake pad or drum. When braking is required, the drive |
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outputs a DC current that is applied to the windings of the motor to quickly |
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brake the motor. The braking current stops when the time entered in F252 times |
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out. |
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The intensity of the DC current used while braking determines how fast the |
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motor will come to a stop and may be set at F251. The intensity setting is |
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entered as a percentage of the full load current of the ASD. |
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DC Injection Braking is also used to preheat the motor or to keep the rotor |
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from spinning freely when the motor is off by providing a pulsating DC current |
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into the motor at the Carrier Frequency. This feature may be enabled at F254. |
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DC Injection Braking Current | Direct Access Number — | F251 |
Program ⇒ Protection ⇒ DC Braking | Parameter Type — Numerical | |
| Factory Default — 50 |
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This parameter sets the percentage of the rated current of the drive that will be
used for DC Injection braking. A larger load will require a higher setting.
Changeable During Run — Yes
Minimum — 0
Maximum — 100
Units — %
124 | H9 ASD Installation and Operation Manual |
