Program features 109
State change conditions ()
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 has remained 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) and the closing torque written into 44.02 Brake torque
memory. 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 acknowledgment 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 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
Mechanical brake opening not allowed.
*A warning can alternatively be selected by 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 or brake is forced to close by optional FSO-xx safety functions
module.
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 acknowledgment (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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