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72 Program features
State change conditions (
)
Brake has been requested to close. The drive logic is requested to ramp down
the speed to a stop (
b3 = 1). The open signal is kept
active (
b0 = 1). The brake logic will remain in this
state until the motor speed has remained below
for the
time defined by
.
Closing conditions have been met. The open signal is deactivated (
b0
→
0) and the closing torque written into
. The ramp-down request is maintained (
b3
= 1). The brake logic will remain in this state until
has
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 closed”,
the drive generates an
Mechanical brake closing failed
, the drive will trip on a
fault after
The brake is closed (
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
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,
Mechanical brake opening not allowed
*A warning can alternatively be selected by
; if so, the drive will keep modulating
and remain in this state.
1
Brake control disabled (parameter
→
0).
2
, bit 2 = 0 or brake is forced to close by optional FSO-xx safety functions
module.
3
Brake has been requested to open and
has expired.
4
Brake open conditions (such as
) fulfilled and
= 0.
5
has elapsed and brake open acknowledgement (if chosen by
) has been received.
6
Brake has been requested to close.
7
Motor speed has remained below closing speed
for the duration of
8
has elapsed and brake close acknowledgement (if chosen by
) has been received.
9
Brake has been requested to open.
10
Brake control enabled (parameter
→
1).
State name
Description
n
Содержание ACS880-x04
Страница 1: ... ABB INDUSTRIAL DRIVES ACS880 primary control program Firmware manual ...
Страница 4: ......
Страница 18: ...18 Using the control panel ...
Страница 24: ...24 Control locations and operating modes ...
Страница 111: ...Application macros 111 Fieldbus control macro This application macro is not supported by the current firmware version ...
Страница 112: ...112 Application macros ...
Страница 496: ...496 Additional parameter data ...
Страница 544: ...544 Fault tracing ...
Страница 602: ...602 Control chain diagrams ...