BONFIGLIOLI active Applications Manual

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10 06/05
4 Activation of a holding brake
In some applications, for example hoist application, elevators or for some machine
tools, activation of a holding brake demands an extended functionality for wear-free
control of the brake.
In addition, some applications demand, according to directives, that the motor is elec-
trically separated from the frequency inverter by a safety contactor at a standstill.
These function modules of the software are activated by the configurations 160, 260
or 460 and supplement the control functions of configurations 110, 210, 410.
The order of events during the start or stop process can be set with the help of the
parameters described in the following chapters.
!
Danger! If a dysfunction of the brake control can lead to major damage, in par-
ticular damage to persons, a second independent device for closing the
brake must exist. It cannot be ruled out that, for example by damage to
the frequency inverter, the brake is released although the frequency
inverter has been switched off.
4.1 Control inputs and outputs
The modular structure of the frequency inverters enables a broad spectrum of applica-
tions on the basis of the available hardware and software functionality. The functional-
ity of the control inputs and outputs described in the brief instructions and operatin
g
instructions is extended in configurations 160, 260 and 460.
4.1.1 Digital outputs
The function "Brake open" in the operating modes 40 and 140 of the digital outputs
enables activation of a corresponding unit via the digital control outputs. The function
uses not only the control commands via the contact inputs but also the set starting
and stopping behavior to control the parameterized digital output. These operating
modes of the digital outputs are replaced by the Operation mode 41 for the ex-
tended brake control in configurations 160, 260 and 460.
The function for the activation of the safety switch is to be assigned to one of the
digital control outputs with Operation mode 42.
Operation mode Function
41 -Brake open
The digital output becomes active (an open contact
closes) when the brake is released.
42 -Safety contactor
The digital output becomes active when the fre-
quency inverter is connected to the motor (safety
contactor on).
Attention! For safety reasons, the inverted Operation mode 141 is not avail-
able. In this operation mode, the brake is not released with the digi-
tal output active. For example, this would also be the case with a
voltage-free frequency inverter or during the initialization phase.

BONFIGLIOLI active Specifications

General

Brand	BONFIGLIOLI
Model	active
Category	DC Drives
Language	English