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 deactiv-
ated (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 re-
ceived.
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 re-
ceived.
8
Brake has been requested to open.9
Brake control enabled (parameter 44.6 → 1).10
Program features 115
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