Brake State Diagram - ABB ACS880 Firmware Manual

114 Program features

Brake state diagram

(from any state)
1
BRAKE DISABLED
BRAKE DISABLED
BRAKE OPENING:
BRAKE OPENING WAIT
BRAKE OPENING DELAY
BRAKE OPEN
BRAKE CLOSING:
(from any state)
2
BRAKE CLOSED
10
8
BRAKE CLOSING
BRAKE CLOSING
DELAY
7
BRAKE CLOSING WAIT
Brake control is disabled (parameter
The brake is closed
Brake has been requested to open. The drive logic is requested
to increase the torque up to opening torque to hold the load in
place (44.1 b1 = 1 and b2 = 1). The state of
is not 0 within a reasonable time, the drive trips on a
1)
fault .
Opening conditions have been met and open signal activated
(44.1 b0 is set). The opening torque request is removed
b1 → 0). The load is held in place by the speed control of the
drive until 44.8
At this point, if
to BRAKE OPEN state. If an acknowledgement signal source has
been selected, its state is checked; if the state is not "brake
open", the drive trips on a
The brake is open
b2 = 0), and the drive is allowed to follow the reference.
3
6
3
6
6
9
(44.1 b0 = 0).
elapses.
44.7 is set to No acknowledge, the logic proceeds
71A3 fault
(44.1 b0 = 1). Hold request is removed
BRAKE OPENING
BRAKE OPENING WAIT
4
BRAKE OPENING
DELAY
5
BRAKE OPEN
44.6 = 0, and 44.1
44.11 is checked; if it
71A5
1)
.
b4 = 0).
(44.1
(44.1