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Program features 85
Outputs of the brake control logic
The mechanical brake is controlled by bit 0 of parameter
44.01
Brake control status
.
This bit should be selected as the source of a relay output (or a digital input/output in
output mode) which is then wired to the brake actuator through a relay. See the wiring
example on page
88
.
The brake control logic, in various states, will request the drive control logic to hold
the motor, increase the torque, or ramp down the speed. These requests are visible in
parameter
44.01
Brake control status
.
Brake state diagram
State descriptions
State name
Description
BRAKE DISABLED
Brake control is disabled (parameter
44.06
Brake control enable
= 0, and
44.01
Brake control status
b4 = 0). The open signal is active (
44.01
Brake control
status
b0 = 1).
BRAKE OPENING
BRAKE OPENING WAIT
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 (
44.01
Brake control status
b1 = 1 and b2 = 1). The state of
44.11
Keep brake closed
is checked; if it is not
0 within a reasonable time, the drive trips on a
71A5
Mechanical brake opening
not allowed
fault
*)
.
BRAKE CLOSING
DELAY
BRAKE CLOSING WAIT
BRAKE DISABLED
BRAKE OPENING
BRAKE OPENING WAIT
BRAKE OPENING
DELAY
BRAKE CLOSED
BRAKE OPEN
BRAKE CLOSING
(from any state)
1
(from any state)
2
3
4
5
6
6
6
7
8
9
3
10
ACS380 FW.book Page 85 Friday, May 4, 2018 4:18 PM
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