Mechanical Brake Control - ABB ACS180 Firmware Manual

80 Program features
Torque trim connection
Torque trim is added at
after the trim addition is available in parameter 26.76 Torque reference act 6.
26.75 Torque reference act 5
torque trim
Frequency trim connection
Frequency trim is added at 28.02 Frequency ref ramp out and the final frequency
reference is generated after the trim addition. At the moment, no parameter is
available to see the final frequency reference after adding frequency trim.
28.02 Frequency ref ramp out
frequency trim
Note: PID trim output auto connection is disabled in the firmware when the drive is
stopped with the 21.04 Emergency stop mode
ramp stop (Off3). In other words, PID trim output actual
output act) will not be added to the respective speed, torque and frequency reference
chains during ramp stop or emergency stop.


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 81. The tables below the state diagram detail the states and transitions. The
timing diagram on page
Inputs of the brake control logic
The start command of the drive (bit 5 of
source of the brake control logic.
26.75 Torque reference act
+
+
44 Mechanical brake control
83 shows an example of a close-open-close sequence.
06.16 Drive status word
5and the final torque reference
26.76 Torque reference act 6
final frequency reference
value Ramp stop (Off1)
(40.05 Process PID trim
as well as several
1) is the main control
or value Eme