ABB ACS850 - Page 221

Parameters 221
42.02 Brake acknowl Selects the source for the external brake on/off supervision
activation (when parameter 42.01 Brake ctrl is set to With
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 through a digital input.
When a brake control error is detected, the drive reacts as
defined by parameter 42.12 Brake fault func.
Note: This parameter cannot be changed while the drive is
running.
DI4 Digital input DI4 (as indicated by 02.01 DI status, bit 3). 1073938945
DI5 Digital input DI5 (as indicated by 02.01 DI status, bit 4). 1074004481
DI6 Digital input DI6 (as indicated by 02.01 DI status, bit 5). 1074070017
DIO4 Digital input/output DIO4 (as indicated by 02.03 DIO status,
bit 3).
1073938947
DIO5 Digital input/output DIO5 (as indicated by 02.03 DIO status,
bit 4).
1074004483
DIO6 Digital input/output DIO6 (as indicated by 02.03 DIO status,
bit 5).
1074070019
Const Bit pointer setting (see Terms and abbreviations on page
102).
-
Pointer
42.03 Open delay 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 42.08 Brake open
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.
0.00 … 5.00 s Brake open delay. 100 = 1 s
42.04 Close 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 speed) after the drive has received
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.
0.00 … 60.00 s Brake close delay. 100 = 1 s
42.05 Close speed Defines the brake close speed (as an absolute value). See
parameter 42.04 Close delay.
0.0 … 1000.0 rpm Brake close speed. 10 = 1 rpm
42.06 Close cmd delay Defines a close command delay, i.e. the time between when
brake close conditions are met and when the close command
is given.
0.00 … 10.00 s Brake close command delay. 100 = 1 s
No. Name/Value Description FbEq