ABB ACS880 Firmware Manual page 115

BRAKE CLOSING WAIT
BRAKE CLOSING DELAY
BRAKE CLOSED
1) A warning can alternatively be selected by 44.17; if so, the drive will keep modulating and remain in
this state.
State change conditions:
1 Brake control disabled (parameter
2 6.11, bit 2 = 0 or brake is forced to close by optional FSO-xx safety functions module.
3 Brake has been requested to open and
4 Brake open conditions (such as 44.10) fulfilled and
5 44.8 has elapsed and brake open acknowledgement (if chosen by 44.7) has been re-
ceived.
6 Brake has been requested to close.
7 Motor speed has remained below closing speed
8 44.13 has elapsed and brake close acknowledgement (if chosen by 44.7) has been re-
ceived.
9 Brake has been requested to open.
10 Brake control enabled (parameter
Brake has been requested to close. The drive logic is requested
to ramp down the speed to a stop
is kept active (44.1, b0 = 1). The brake logic will remain in this
state until the motor speed has remained below
time defined by 44.15.
Closing conditions have been met. The open signal is deactiv-
ated (44.1 b0 → 0) and the closing torque written into 44.2. The
ramp-down request is maintained
will remain in this state until
At this point, if 44.7 is set to
to BRAKE CLOSED state. If an acknowledgement signal source
has been selected, its state is checked; if the state is not "brake
closed", the drive generates an
the drive will trip on a
The brake is closed (44.1, b0 = 0). The drive is not necessarily
modulating.
Note concerning open-loop (encoderless) applications: If the
brake is kept closed by a brake close request (either from
parameter 44.12 or an FSO-xx safety functions module) against
a modulating drive for longer than 5 seconds, the brake is forced
to closed state and the drive trips on a fault, 71A5.
44.6 → 0).
44.16
44.6 → 1).
Program features 115
(44.1 b3 = 1). The open signal
(44.1 b3 = 1). The brake logic
44.13 has elapsed.
No acknowledge, the logic proceeds
A7A1 warning. If
71A2 fault after 44.18.
has expired.
44.11 = 0.
44.14 for the duration of 44.15.
44.14 for the
44.17 = Fault,