ABB ACS880 Firmware Manual page 72

72 Program features
State name
BRAKE CLOSING:
BRAKE CLOSING WAIT
BRAKE CLOSING DELAY
BRAKE CLOSED
*A warning can alternatively be selected by
and remain in this state.
State change conditions (
1 Brake control disabled (parameter
2 06.11 Main status
module.
3 Brake has been requested to open and
4 Brake open conditions (such as
5 44.08 Brake open delay
acknowledge selection) has been received.
6 Brake has been requested to close.
7 Motor speed has remained below closing speed
Brake close level delay.
8 44.13 Brake close delay
acknowledge selection) has been received.
9 Brake has been requested to open.
10 Brake control enabled (parameter
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Brake has been requested to close. The drive logic is requested to ramp down
the speed to a stop (44.01 Brake control status
active (44.01 Brake control status
state until the motor speed has remained below
time defined by 44.15 Brake close level
Closing conditions have been met. The open signal is deactivated
b0 → 0) and the closing torque written into
control status
memory. The ramp-down request is maintained
= 1). The brake logic will remain in this state until
elapsed.
At this point, if 44.07 Brake acknowledge selection
the logic proceeds to BRAKE CLOSED
source has been selected, its state is checked; if the state is not "brake closed",
the drive generates an
Brake fault function = Fault, the drive will trip on a
closing failed fault after
The brake is closed (44.01 Brake control status
necessarily modulating.
Note concerning open-loop (encoderless) applications: If the brake is kept
closed by a brake close request (either from parameter
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,
Mechanical brake opening not
44.17 Brake fault
)
n
44.06 Brake control enable
word, bit 2 = 0 or brake is forced to close by optional FSO-xx safety functions
44.16 Brake reopen delay
44.10 Brake open
has elapsed and brake open acknowledgement (if chosen by
has elapsed and brake close acknowledgement (if chosen by
44.06 Brake control enable
Description
b3 = 1). The open signal is kept
b0 = 1). The brake logic will remain in this
44.14 Brake close level
delay.
(44.01 Brake control status
state. If an acknowledgement signal
A7A1 Mechanical brake closing failed
44.18 Brake fault delay.
b0 = 0). The drive is not
allowed.
function; if so, the drive will keep modulating
→ 0).
has expired.
torque) fulfilled and 44.11 Keep brake closed
44.14 Brake close level
→ 1).
for the
(44.01 Brake
44.02 Brake torque
44.13 Brake close delay has
is set to No acknowledge,
warning. If 44.17
71A2 Mechanical brake
44.12 or an FSO-xx
71A5
= 0.
44.07 Brake
for the duration of 44.15
44.07 Brake
b3