100 Chapter 7 - Parameters Description
User Manual
BU Configuration
P.280 Brake res OL en
(Braking resistor overload protection enabling)
Enabling of the thermal protection of the braking resistance.
The protection efficiency is dependant on the accuracy of the parameters concerning the rated value of the
braking resistance.
An overload of the braking resistor, will cause the intervention of the alarm "Braking resistor overload".
P.281 Brake res value
(Braking resistor value)
Rated Ohm value of the braking resistance connected.
P.282 Brake res power
(Braking resistor power)
Rated power of the braking resistance connected.
P.283 Br res thermal K
(Braking resistor thermal costant)
Thermal constant of the braking resistance connected.
This data is expressed in seconds, and it is normally provided by the manufacturer of the device, as the time
that the resistor takes to reach its nominal working temperature while dissipating its rated power.
Further information on the use of the braking resistance and braking devices, can be see in chapter 5.8.
The parameter
d.053
(menu
DISPLAY
), is the monitoring of the braking resistor overload level.
A value of 100% represent the threshold for the alarm.
The alarm will be displayed with the message "
OLr
".
Code
Name
[Code] & Function.
Default
MIN
MAX
Unit
Variation
IPA
P.280
Brake res OL en
[0] Disable
0
0
1
445
[1] Enable
P.281
Brake res value
(*)
1
250
ohm
446
P.282
Brake res power
(*)
0.01
25
kW
0.01
447
P.283
Br res thermal K
(*)
1
250
sec
448
DC Brake Configuration
The drive provides as a standard a set of parameters for the DC braking management.
With this function the drive injects a DC current into the motor windings, arousing in this way a braking torque.
The DC braking can be useful to brake the motor around the zero speed, either at the START and at the STOP
stage, maintaining also the motor shaft locked for a short time.
It should not be used to obtain an intermediate braking.
The function parameters, allow a full control of the function.
At every DC braking command, the message "
DCB
" will appear on the display.
P.300 DC braking level
Setting of the DC current level to be injected on the motor phases.
It is a percentage of the
Motor rated current (P.040).
P.301 DCB lev fac src
(DC Braking level factor source)
The DC braking level can be linearly regulated through an analog reference signal.
The regulation of the DC braking level will be between 0% (setting the inputs at 0V - 0mA - 4mA) and 100% of the
value setted with
P.300
(+/- 10V - 20mA).
This parameter selects the source from where this function is provided and controlled.
