Allen-Bradley PowerFlex 70 User Manual page 55

No. Parameter Name and Description
158 [DC Brake Level]
Defines the maximum DC brake current in
percentage of drive rated current.
The DC braking voltage used in this
function is created by a PWM algorithm
and may not generate the smooth holding
force needed for some applications. Refer
to the PowerFlex Reference Manual.
ATTENTION: If a hazard of injury due to movement of
equipment or material exists, an auxiliary mechanical braking
!
device must be used.
ATTENTION: This feature should not be used with
synchronous or permanent magnet motors. Motors may be
!
demagnetized during braking.
159 [DC Brake Time]
Sets the amount of time DC brake current
is "injected" into the motor.
160 [Bus Reg Ki]
Sets the responsiveness of the bus
regulator.
161 [Bus Reg Mode A]
[Bus Reg Mode B]
162
Sets the method and sequence of the DC
bus regulator voltage. Choices are
dynamic brake, frequency adjust or both.
Sequence is determined by programming
or digital input to the terminal block.
If a dynamic brake resistor is connected to
the drive, both these parameters must be
set to either option 2, 3 or 4.
Refer to the Attention statement on
Preface-4 for important information on
bus regulation.
163 [DB Resistor Type]
Selects whether the internal or an
external DB resistor will be used.
Programming and Parameters
Values
Default: [Rated Amps]
0/[Rated Amps] × 1.5
Min/Max:
(Equation yields
approximate maximum
value.)
Display: 0.1 Amps
Default: 0.0 Secs
Min/Max: 0.0/90.0 Secs
Display: 0.1 Secs
Default: 450
Min/Max: 0/5000
Display: 1
Default: 1 "Adjust Freq"
4 "Both-Frq 1st"
Options: 0 "Disabled"
1 "Adjust Freq"
2 "Dynamic Brak"
3 "Both-DB 1st"
4 "Both-Frq 1st"
Default: 0 "Internal Res"
Options: 0 "Internal Res"
1 "External Res"
2 "None"
3-19
155
thru
158
161
162
160
163
161
162