ABB ACS850 Firmware Manual page 170

170 Parameters
No. Name/Value
No ack
42.02 Brake acknowl
DI4
DI5
DI6
DIO4
DIO5
DIO6
Const
Pointer
42.03 Open delay
0.00 ... 5.00 s
42.04 Close delay
0.00 ... 60.00 s
42.05 Close speed
0.0 ... 1000.0 rpm
Description
Brake control enabled without supervision.
Selects the source for the external brake on/off supervision
activation (when parameter
ack). The use of the external on/off supervision signal is
optional.
1 = The brake is open
0 = The brake is closed
Brake supervision is usually controlled with a digital input. It
can also be controlled with an external control system, e.g.
fieldbus.
When a brake control error is detected, the drive reacts as
defined by parameter 42.12 Brake fault
Note: This parameter cannot be changed while the drive is
running.
Digital input DI4 (as indicated by
Digital input DI5 (as indicated by
Digital input DI6 (as indicated by
Digital input/output DIO4 (as indicated by
bit 3).
Digital input/output DIO5 (as indicated by
bit 4).
Digital input/output DIO6 (as indicated by
bit 5).
Bit pointer setting (see Terms and abbreviations
Defines the brake open delay (= the delay between the
internal open brake command and the release of the motor
speed control). The delay counter starts when the drive has
magnetised the motor and risen the motor torque to the level
required at the brake release (parameter
torq). Simultaneously with the counter start, the brake
function energises the relay output controlling the brake and
the brake starts opening.
Set the delay the same as the mechanical opening delay of
the brake specified by the brake manufacturer.
Brake open delay.
Defines the brake close delay. The delay counter starts when
the motor actual speed has fallen below the set level
(parameter 42.05 Close
the stop command. Simultaneously with the counter start, the
brake control function de-energises the relay output
controlling the brake and the brake starts closing. During the
delay, the brake function keeps the motor live preventing the
motor speed from falling below zero.
Set the delay time to the same value as the mechanical
make-up time of the brake (= operating delay when closing)
specified by the brake manufacturer.
Brake close delay.
Defines the brake close speed (as an absolute value). See
parameter 42.04 Close
Brake close speed.
42.01 Brake ctrl is set to
func.
02.01 DI status, bit 3).
02.01 DI status, bit 4).
02.01 DI status, bit 5).
02.03 DIO
02.03 DIO
02.03 DIO
42.08 Brake open
speed) after the drive has received
delay.
FbEq
2
With
1073938945
1074004481
1074070017
status, 1073938947
status, 1074004483
status, 1074070019
on page 63). -
100 = 1 s
100 = 1 s
10 = 1 rpm