Setting Brake Function; Boost Function - Helios FU Comfort Sinus Manuel De Montage Et D'utilisation

Installation and Operating Specification FU Comfort Sinus
9.11.7

Setting brake function

Motor Setup
0
DC brake mode
Motor Setup
5 sec
DC brake time
Motor Setup
50 %
DC brake level
Info
23.4 °C
E1 Actual
9.11.8

Boost function

The boost function5is an automatic voltage increase in case of dynamic demands on the control
system. When using the square characteristic, the output voltage is increased to the value of the linear
characteristic with the "Boost function" switched on. This induces more torque on the motor and the
current therefore does not increase too much when accelerating. Just before reaching the setpoint of
the modulation, the motor voltage corresponding to the square characteristic is switched back to. The
boost process is only activated in case of a sufficiently large increase in modulation (from approx.
5 %).
In operation with linear characteristic ("UF square" = "OFF") the Boost function is not possible.
L-BAL-E304-GB 2004
DC brake mode
Setting function of DC-brake for frequency inverters.
For units that come with a factory engaged DC brake mode (if extant,
mode setting), simultaneously activating the "DC brake mode " only makes sense in
exceptional cases.
0 = no brake function (factory setting).
1 = brakes before start (before modulation is returnd)
If, under certain circumstances, the modulation switches back on while the motor is still
rotating fast, this can result in a re-supply of the inverter's "overcurrent disconnection".
The brake function can be activated to prevent this. This is then always active for an
adjustable period before triggering starts. I.e., the brake function is always initiated
before modulation after has it returned to "0". The suitable adjustments depend on the
centrifugal force of the motor and the conditions in the installation.
2 = Special function, brakes before stop (as soon as modulation "0").
The motor does not run out up to stop. The motor is braked actively, as soon as no
modulation is present (Setpoint = "0" or Enable = "OFF") .
Test required. The "min. speed" adjustment must be set to "0".
Attention! With the frequently one behind the other following DC bracings it can come
to strong heating up of the motor.
To prevent any overheating, motor protection in the form of a temperature limiter
installed in the motor is required (
DC brake time
Maximal length of DC-brake for frequency inverters.
If the braking is activated, the d.c. brake torque is active for this time.
Setting range: 0...250 sec.
factory setting: 5 / 10 sec. (depending on device type)
DC brake level
Direct-current level, generated for braking. The higher this value, the greater the
braking effect.
The setting "DC brake level" refers in % to the value set in "MotorRated Curr.".
Setting range: 0...100 %
Factory setting: 50 %
The setting is dependent on the size of the fan/motor. Attention! Too high values can
lead to a considerable braking effect.
Same setting affects also the function "Motorheating"(
The active brake mode is signalled by the brake symbol in the display.
Part.-No.
92/139
motor protection).
IO Setup).
Programming
DC brake