87
DC Inj Cfg FUN 06
DC Inj Freq FUN 07
FUN: DC Inj Freq
07 0.0Hz
FUN: DC Inj Cfg
06 DC at Stop
7 - PARAMETER DESCRIPTION
LCD Display
Description DC Injection Conguration. DC injection braking may be used to stop the motor quicker than normally
possible by either a ramp-to-stop or coast-to-stop. The RSi S4 drive allows DC injection braking to be
initiated either when a digital input assigned to DC injection braking becomes active or when a specied
frequency is reached, or when either of these occur.
When using a digital input for DC injection braking, one of the digital inputs must be congured for DC
injection braking. The amount of braking force is set by parameter FUN-09 - DC Inj Lvl. The length of
time that the braking force is applied is determined by the time that the selected digital input is active.
The digital input only applies the brake when a run command is present. The drive will DC brake when
the brake input is applied while running and return back to the same frequency as it was prior to the input
being applied when the input is removed.
The second type of DC injection braking supported by the RSi S4 drive is where DC injection braking
occurs below a specied frequency. With this type of DC injection braking, as the drive ramps down after
a Stop command, DC injection braking begins when the frequency reaches the value specied in FUN
07 - DC Inj Freq. (If the frequency at the time of a Stop command is less than that of FUN 07 - DC Inj
Freq, DC injection braking begins immediately). The braking continues for the time period specied by
parameter FUN 08 - DC Inj Time. Once the time period elapses, the drive may be re-started.
z NOTE: If FUN 08 - DC Inj Time is set to zero, braking is applied until the digital input “ DC Inject” is
de-activated. To re-start, the DC Inject Digital Input must be activated and then the run command re-
issued.
LCD Display
Range 0.00 to 25.00 Hz (Default 0.0Hz)
Description DC Injection Frequency. The drive will apply DC every time the frequency falls below this setting when
FUN 06 - DC Inj Cfg is set to DC on Freq. This parameter sets the value of the frequency the drive will
apply the DC See parameter FUN 06 - DC Inj Cfg for more information..
See also FUN 06 - DC Inj Cfg, FUN 07 - DC Inj Freq, FUN 08 - DC Inj Time and FUN 09 - DC Inj Level for
further programming options.
Parameter Value Description
DC at Stop
DC inject only on Stop (Default)
DC at Start
DC inject only on Start
DC at Both
DC inject on both Start and Stop
DC on Freq
DC inject only on Stop below the set frequency
Range
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