Vacon X5, User Manual

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X5 AC Drive User’s Manual Chapter 7: X5 Parameters
DPD00089A - 82 -
© 2009 Vacon Incorporated All Rights Reserved
404 Accel Time 2 Default: 3.0 s
Range: 0.1 to 3200.0 s
Level 2
This parameter provides an alternate ramping time for the drive when accelerating, configuring the length of time to
accelerate from 0 Hz to the value of parameter
302 (Max Frequency) . This acceleration ramp is selected by parameter
401 (Ramp Select) or Sequencer Configuration.
Note that extremely short acceleration times may result in nuisance fault trips.
405 Decel Time 2 Default: 3.0 s
Range: 0.1 to 3200.0 s
Level 2
This parameter provides an alternate ramping time for the drive when decelerating, configuring the length of time to
decelerate from the value of parameter
302 (Max Frequency) to 0 Hz. This deceleration ramp is selected by parameter
401 (Ramp Select) or Sequencer Configuration.
Note that extremely short deceleration times may result in nuisance fault trips or may require an external dynamic brake
or regen current limit.
406 DC Inject Config Default: DC at Stop
Range: n/a
Level 2
DC injection braking may be used to stop the motor more quickly than is possible by either a ramp-to-stop or a coast-
to-stop. The X5 drive allows DC braking to be initiated either when a digital input assigned to DC braking becomes true,
when a specified frequency is reached, or when either of these events occurs.
When using a digital input for DC braking, you must use one of the DI parameters to configure the selected digital input
for DC braking. The amount of braking force is set by parameter
408 (DC Inject Level) . The length of time that the
braking force is applied is determined by the time that the selected digital input is active. The second type of DC injection
braking supported by the X5 drive is where DC braking occurs at a specified frequency. The duration of the braking is
adjusted by parameter
407 (DC Inject Time) .
With this type of braking, as the drive slows down after a Stop command, DC braking begins when the frequency
reaches the value set in parameter
409 (DC Inj Freq) . If the frequency at the time of a Stop command is less than that
of DC Inj Freq , DC braking begins immediately. The braking continues for the time period specified by parameter DC
Inj Freq . Once the time period elapses, the drive may be restarted.
Parameter Value Description
DC at Stop DC inject only on Stop
DC at Start DC inject only on Start
DC at Both DC inject only on both Start and Stop
DC on Freq DC inject only on Stop below the set frequency
407 DC Inject Time Default: 0.2 sec
Range: 0.0 to 5.0 sec
Level 2
If parameter 406 is set to DC at Stop (see page 82), direct current is applied to the motor. This parameter, DC Inject
Time , determines how long the direct current will be applied, and how long DC is applied at Start if programmed
accordingly.
This parameter works in tandem with parameter
410 (DC Inject Config) and the other parameters associated with DC
Inject Config. That is, the time period configured by this parameter, DC Inject Time , determines how long DC injection
braking will be active. When DC injection braking is controlled by a digital input, the braking continues for as long as the
digital input is true,
plus the time set by parameter 407 (DC Inject Time) . When it is controlled by frequency, however,
it continues for the length of time once the drive reaches the frequency set by parameter 409 (DC Inj Freq) .
408 DC Inject Level Default: 50.0%
Range: 0.0% to 100.0%
Level 2
Configures the amount of DC injection that will occur when direct current is injected into the motor windings, which acts
as a braking force. The amount of current is expressed as a percentage of nominal motor current. The braking force
may be applied when starting or stopping. If this parameter is set to 0.0%, the DC injection is disabled.
409 DC Inj Freq
Default: 0 Hz
Range: 0.0 to 20.0 Hz
Level 2
Configures the frequency under which direct current will be applied to the drive when DC Inject Config is set to “DC on
Freq.” If this parameter is set to 0.0, the parameter operates in the same way as “DC at Stop.”
Table 7-2: Description of X5 Parameters (Page 12 of 40)