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Vacon NX series Applications Manual

Vacon NX series
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ID509
ID511
ID513
ID510
ID512
ID514
Actual Reference
Requested
Reference
Low
Lim
Low Lim
High Lim
High
Lim
Fig. 70: Example of prohibit frequency area setting
515 DC BRAKING FREQUENCY AT STOP 234567 (2.4.10)
The output frequency at which the DC braking starts. See Fig. 70 Example of prohibit
frequency area setting.
516 DC-BRAKING TIME AT START 234567 (2.4.11)
DC-brake is activated when the start command is given. This parameter gives the time
during which the DC current is fed to the motor before the acceleration starts.
DC brake current is used at start in order to premagnetize the motor before running. This
will improve the torque performance at start. Varying between 100 ms to 3 s, the time
needed depends on motor size. A bigger motor requires a longer time. See parameter ID507.
NOTE!
When Flying Start (see parameter ID505) is used as start function DC braking at
start is disabled.
518 ACCELERATION/DECELERATION RAMP SPEED SCALING RATIO BETWEEN PROHIBIT
FREQUENCY LIMITS 23457 (2.5.3, 2.5.7)
Defines the acceleration/deceleration time when the output frequency is between the
selected prohibit frequency range limits (parameters ID509 to ID514). The ramping speed
(selected acceleration/ deceleration time 1 or 2) is multiplied with this factor. E.g. value 0.1
makes the acceleration time 10 times shorter than outside the prohibit frequency range
limits.
PARAMETER DESCRIPTIONS VACON · 307
24-HOUR SUPPORT +358 (0)201 212 575 · EMAIL: VACON@VACON.COM
8

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Vacon NX series Specifications

General IconGeneral
Product typeAC Drive
Output voltage range0-Uin
Frequency range0-500 Hz
Enclosure classesIP00, IP21
Mounting typesWall
Braking chopperIntegrated or external
EMC filterBuilt-in or external
Control modesScalar, Vector
Protection featuresOvercurrent, overvoltage, undervoltage, overtemperature, short circuit
Communication optionsModbus, Profibus, CANopen, Ethernet
Ambient temperature range-10°C to +50°C
Cooling methodAir-cooled

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