Program features 71
Brake state diagram
State descriptions
State name
Description
Brake control is disabled (parameter
= 0, and
b4 = 0). The brake is closed (
b0 = 0).
:
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 (
b1 = 1 and b2 = 1). The state of
is checked; if it is not
0 within a reasonable time, the drive trips on a
fault*.
Opening conditions have been met and open signal activated (
b0 is set). The opening torque request is removed (
b1
→
0). The load is held in place by the speed control of the
drive until
elapses.
is set to
,
the logic proceeds to
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
Mechanical brake opening failed
fault*.
The brake is open (
b0 = 1). Hold request is removed
b2 = 0), and the drive is allowed to follow the
reference.
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
Summary of Contents for ACS880-x04
Page 1: ... ABB INDUSTRIAL DRIVES ACS880 primary control program Firmware manual ...
Page 4: ......
Page 18: ...18 Using the control panel ...
Page 24: ...24 Control locations and operating modes ...
Page 112: ...112 Application macros ...
Page 496: ...496 Additional parameter data ...
Page 544: ...544 Fault tracing ...
Page 602: ...602 Control chain diagrams ...