80 Program features
State change conditions ()
BRAKE OPENING DELAY Opening conditions have been met and open signal activated (44.01 Brake
control status b0 is set). The opening torque request is removed (44.01 Brake
control status b1
→
0). The load is held in place by the speed control of the
drive until 44.08 Brake open delay elapses.
At this point, if 44.07 Brake acknowledge selection is set to No acknowledge,
the logic proceeds 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 71A3 Mechanical brake opening failed fault
*)
.
BRAKE OPEN The brake is open (44.01 Brake control status b0 = 1). Hold request is removed
(44.01 Brake control status b2
=
0), and the drive is allowed to follow the
reference.
BRAKE CLOSING
BRAKE CLOSING WAIT Brake has been requested to close. The drive logic is requested to ramp down
the speed to a stop (44.01 Brake control status b3 = 1). The open signal is kept
active (44.01 Brake control status b0 = 1). The brake logic will remain in this
state until the motor speed is below 44.14 Brake close level for the time defined
by 44.15 Brake close level delay.
BRAKE CLOSING DELAY Closing conditions have been met. The open signal is deactivated (44.01 Brake
control status b0
→
0). The ramp-down request is maintained (44.01 Brake
control status b3 = 1). The brake logic will remain in this state until 44.13 Brake
close delay has elapsed.
At this point, if 44.07 Brake acknowledge selection 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 Mechanical brake closing failed warning. If 44.17
Brake fault function = Fault, the drive will trip on a 71A2 Mechanical brake
closing failed fault after 44.18 Brake fault delay.
BRAKE CLOSED The brake is closed (44.01 Brake control status 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) against a
modulating drive for longer than 5 seconds, the brake is forced to closed state
and the drive trips on a fault, 71A5 Mechanical brake opening not allowed.
*) A warning can alternatively be selected by parameter 44.17 Brake fault function; if so, the drive will keep
modulating and remain in this state.
1 Brake control disabled (parameter 44.06 Brake control enable
→
0).
2 06.11 Main status word, bit 2 = 0.
3 Brake has been requested to open and 44.16 Brake reopen delay has expired.
4 Brake open conditions (such as 44.10 Brake open torque) fulfilled and 44.11 Keep brake closed = 0.
5 44.08 Brake open delay has elapsed and brake open acknowledgement (if chosen by 44.07 Brake
acknowledge selection) has been received.
6 Brake has been requested to close.
7 Motor speed has remained below closing speed 44.14 Brake close level for the duration of 44.15
Brake close level delay.
8 44.13 Brake close delay has elapsed and brake close acknowledgement (if chosen by 44.07 Brake
acknowledge selection) has been received.
9 Brake has been requested to open.
10 Brake control enabled (parameter 44.06 Brake control enable
→
1).
State name Description
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