Brake has been requested to close. The drive logic is requested to
ramp down the speed to a stop (44.1 b3 = 1). The open signal is
kept active (44.1, b0 = 1). The brake logic will remain in this state
until the motor speed has remained below 44.14 for the time defined
by 44.15.
BRAKE CLOSING WAIT
Closing conditions have been met. The open signal is deactivated
(44.1 b0 → 0) and the closing torque written into 44.2. The ramp-
down request is maintained (44.1 b3 = 1). The brake logic will remain
in this state until 44.13 has elapsed.
BRAKE CLOSING DELAY
At this point, if 44.7 is set to No acknowledge, the logic proceeds 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 A7A1 warning. If 44.17 = Fault, the drive will
trip on a 71A2 fault after 44.18.
The brake is closed (44.1, b0 = 0). The drive is not necessarily
modulating.
BRAKE CLOSED
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.
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:
Brake control disabled (parameter 44.6 → 0).
1
6.11, bit 2 = 0 or brake is forced to close by optional FSO-xx safety functions module.
2
Brake has been requested to open and 44.16 has expired.
3
Brake open conditions (such as 44.10) fulfilled and 44.11 = 0.
4
44.8 has elapsed and brake open acknowledgement (if chosen by 44.7) has been received.
5
Brake has been requested to close.6
Motor speed has remained below closing speed 44.14 for the duration of 44.15.
7
44.13 has elapsed and brake close acknowledgement (if chosen by 44.7) has been received.
8
Brake has been requested to open.9
Brake control enabled (parameter 44.6 → 1).
10
78 Program features
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