Mechanical Brake Control - ABB ACS580 Firmware Manual

The change rate is defined in
would take for the value to change from the minimum
value) to the maximum
and down signals are simultaneously on, the motor potentiometer value does not
change.
The output of the function is shown by
directly be set as the reference source in the main selector parameters, or used as an
input by other source selector parameters, both in scalar and vector control.
The following example shows the behavior of the motor potentiometer value.
1
22.73
0
1
22.74
0
22.77
22.80
0
22.76
Settings
Parameters 22.71...22.80


Mechanical brake control

A mechanical brake can be used for holding the motor and driven machinery at zero
speed when the drive is stopped, or not powered. The brake control logic observes
the settings of parameter group
external signals, and moves between the states presented in the diagram on page
106. The tables below the state diagram detail the states and transitions. The timing
diagram on page 108
Inputs of the brake control logic
The start command of the drive (bit 5 of
source of the brake control logic.
Outputs of the brake control logic
The mechanical brake is to be controlled by bit 0 of parameter
status. This bit should be selected as the source of a relay output (or a digital
22.75 Motor potentiometer ramp time
(22.77 Motor potentiometer max
22.80 Motor potentiometer ref
22.75
(page 210).
44 Mechanical brake control
shows an example of a close-open-close sequence.
06.16 Drive status word
Program features 105
as the time it
(22.76 Motor potentiometer min
value) or vice versa. If the up
act, which can
as well as several
1) is the main control
44.01 Brake control