Brake state diagram
BRAKE DISABLED
BRAKE OPENINGBRAKE CLOSED
BRAKE OPENING WAIT
BRAKE OPENING
DELAY
BRAKE CLOSING
BRAKE CLOSING
DELAY
BRAKE CLOSING WAIT
BRAKE OPEN
(from any state)
(from any state)
1
2
10
3
6
4
5
3
6
8
7
6
9
Brake control is disabled (parameter 44.6 = 0, and 44.1 b4 = 0).
The brake is closed (44.1 b0 = 0).
BRAKE DISABLED
BRAKE OPENING:
Brake has been requested to open. The drive logic is requested
to increase the torque up to opening torque to hold the load in
place (44.1 b1 = 1 and b2 = 1). The state of 44.11 is checked; if it
is not 0 within a reasonable time, the drive trips on a 71A5
fault
1)
.
BRAKE OPENING WAIT
Opening conditions have been met and open signal activated
(44.1 b0 is set). The opening torque request is removed (44.1
b1 → 0). The load is held in place by the speed control of the
drive until 44.8 elapses.
BRAKE OPENING DELAY
At this point, if 44.7 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 fault
1)
.
The brake is open (44.1 b0 = 1). Hold request is removed (44.1
b2 = 0), and the drive is allowed to follow the reference.
BRAKE OPEN
BRAKE CLOSING:
114 Program features
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