ADV200 WA • Functions description and parameters list
85
The drive is capable of managing a direct current injection phase. During this phase a braking torque is generated that
can be used to stop the motor or block the rotor.
The following characteristics can be configured:
- signal used to activate the direct current injection phase
- direct current injection phase activation mode
- delay between activation of request for DC braking and start of direct current injection
- duration of direct current injection phase
- intensity of injected direct current
This function is useful for:
- slowing the motor running at any speed to zero speed
- slowing a motor driven by the load before applying the start command
- keeping the rotor blocked at the end of a deceleration ramp following a stop command.
This function cannot be used for intermediate braking as the motor speed must be brought to zero.
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
22.3.1 3150 DC braking cmd src
LINK 16
6000
0
16384
ERW VS
This parameter is used to select the origin (source) of the
DC braking cmd
signal. The signal to be associ-
ated 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
22.3.2 3152 DC brake mode
ENUM
Off
0
1
ERW VS
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 refer-
ence threshold = zero has been reached.
Example:
With the motor running at any speed, when the stop command is enabled the ramp output decreases accord-
ing to the selected ramp time. When the speed reference threshold = zero is reached PAR
934 Ref is 0 = 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 configure the duration of the injection phase and
PAR
3158 DC brake current
is used to configure the intensity of the injection phase current.
In
“On Command”
mode the direct current injection phase is executed when the
DC braking cmd
config-
ured 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
injection phase is activated. When the command is enabled and after the delay configured in PAR
3154 DC
brake delay
direct current injection starts. PAR
3156 DC brake duration
is used to configure the duration of
the injection phase and PAR
3158 DC brake current
is used to configure 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 cur-
Summary of Contents for ADV200 WA
Page 84: ...84 ADV200 WA Functions description and parameters list 22 3 FUNCTIONS DC BRAKING ...
Page 274: ...274 ADV200 WA Block Diagrams G Block Diagrams System Diagrams Index Drive overview ...
Page 275: ...ADV200 WA Block Diagrams 275 References ...
Page 276: ...276 ADV200 WA Block Diagrams Ramps Multireference ...
Page 277: ...ADV200 WA Block Diagrams 277 Motorpotentiometer Jog function ...
Page 278: ...278 ADV200 WA Block Diagrams Monitor function ...
Page 279: ...ADV200 WA Block Diagrams 279 ...
Page 280: ...280 ADV200 WA Block Diagrams Commands ...
Page 281: ...ADV200 WA Block Diagrams 281 ...
Page 282: ...282 ADV200 WA Block Diagrams Digital inputs ...
Page 283: ...ADV200 WA Block Diagrams 283 Digital outputs ...
Page 284: ...284 ADV200 WA Block Diagrams Analog inputs ...
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Page 286: ...286 ADV200 WA Block Diagrams Analog outputs ...
Page 287: ...ADV200 WA Block Diagrams 287 Speed reg gains ...
Page 288: ...288 ADV200 WA Block Diagrams VF parameters ...
Page 289: ...ADV200 WA Block Diagrams 289 Functions ...
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Page 293: ...ADV200 WA Block Diagrams 293 Process ...
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