gefran SIEIDrive ADV100 - Page 84

84 ADV100 • Functions description and parameters list
During the direct current injection phase the kinetic energy of the motor is dissipated as heat in the motor.
The following parameters allow complete control of the function.
Menu PAR Description UM Type FB BIT Def Min Max Acc Mod
22.2.1 3150 DCbrakingcmdsrc LINK 16 6000 0 16384 ERW FVS
This parameter is used to select the origin (source) of the DCbrakingcmd signal. The signal to be associated with
this function can be selected from the “L_DIGSEL2” selection list.
If the command is activated (=1) DC braking is enabled.
In the default condition the origin of the DCbrakingcmd signal is 6000 (disabled).
Menu PAR Description UM Type FB BIT Def Min Max Acc Mod
22.2.2 3152 DCbrakemode ENUM Off 0 1 ERW FVS
Setting of the direct current braking mode.
0 Off
1 At Stop
2 On Command
3 OnCmd & AtStop
If set to 0 the direct current injection phase is never executed.
If set to 1 the direct current injection phase is executed when the stop command is sent and the speed reference
threshold = zero has been reached.
Example:
With the motor running at any speed, when the stop command is enabled the ramp output decreases according to
the selected ramp time. When the speed reference threshold = zero is reached PAR 934Riferimento=0 the direct
current injection phase is enabled and direct current injection starts after a delay set in PAR 3154DCbrakedelay.
PAR 3156DCbrakeduration is used to congure the duration of the injection phase and PAR 3158DCbrakecur-
rent is used to congure the intensity of the injection phase current.
In “OnCommand” mode the direct current injection phase is executed when the DCbrakingcmd congured using
parameter PAR 3150DCbrakingcmdsrc is sent.
Example:
Motor running driven by load. When the drive is enabled and the DCbrakingcmd is sent the direct current injec-
tion phase is activated. When the command is enabled and after the delay congured in PAR 3154DCbrakedelay
direct current injection starts. PAR 3156DCbrakeduration is used to congure the duration of the injection phase
and PAR 3158DCbrakecurrent is used to congure the intensity of the injection phase current.
If the command is an impulse shorter than the time set with PAR 3156DuratafrenaturaDC, the direct current injec-
tion phase continues at least for the time set in parameter 3156DCbrakeduration.
If the command is an impulse longer than the time set with 3156DCbrakeduration, the direct current injection
phase continues for as long as the command is present.
In “OnCmd&AtStop” modes the direct current injection phase is executed when one of the two conditions de-
scribed in the“AtStop” or “OnCommand” modes is present.
Menu PAR Description UM Type FB BIT Def Min Max Acc Mod
22.2.3 3154 DCbrakedelay s FLOAT 0.5 0.01 30.0 ERW FVS
This parameter is used to congure the delay in seconds between the moment DC braking is requested and the mo-
ment direct current injection starts. This delay enables the motor to demagnetise, and thus avoid an overcurrent due
to the electromotive force of the motor (e.f.m.).
The value of this parameter, added to parameter 3156 DCbrakeduration, must be lower than the value of param-
eter 1006 Speed0disabledly, otherwise direct current injection will stop when the drive is disabled.