ABB ACS880-17 - Page 330

330 Parameters
44.08 Brake open delay Defines the brake open delay, ie. the delay between the
internal open brake command and the release of motor speed
control. The delay timer starts when the drive has magnetized
the motor and increased the motor torque to the level required
for brake release (parameter 44.03 Brake open torque
reference). Simultaneously with the timer start, the brake
control logic energizes the brake control output and the brake
starts to open.
Set this parameter to the value of mechanical opening delay
specified by the brake manufacturer.
0.00 s
0.00 … 5.00 s Brake open delay. 100 = 1 s
44.09 Brake open torque
source
Defines a source that is used as a brake opening torque
reference if
• its absolute value is greater than the setting of parameter
44.10 Brake open torque, and
• its sign is the same as the setting of 44.10 Brake open
torque.
See parameter 44.10 Brake open torque.
Brake open
torque
Zero Zero. 0
AI1 scaled 12.12 AI1 scaled value (see page 161). 1
AI2 scaled 12.22 AI2 scaled value (see page 162). 2
FBA ref1 03.05 FB A reference 1 (see page 122). 3
FBA ref2 03.06 FB A reference 2 (see page 122). 4
Brake torque
memory
Parameter 44.02 Brake torque memory. 7
Brake open torque Parameter 44.10 Brake open torque.8
Other Source selection (see Terms and abbreviations on page 114). -
44.10 Brake open torque Defines the sign (ie. direction of rotation) and minimum
absolute value of the brake open torque (motor torque
requested at brake release in percent of motor nominal
torque).
The value of the source selected by parameter 44.09 Brake
open torque source is used as the brake open torque only if it
has the same sign as this parameter and has a greater
absolute value.
Note: This parameter is not effective in scalar motor control
mode.
0.0%
-1600.0 … 1600.0% Minimum torque at brake release. See par.
46.03
44.11 Keep brake closed Selects a source that prevents the brake from opening.
0 = Normal brake operation
1 = Keep brake closed
Note: This parameter cannot be changed while the drive is
running.
Not selected
Not selected 0. 0
Selected 1. 1
DI1 Digital input DI1 (10.02 DI delayed status, bit 0). 2
DI2 Digital input DI2 (10.02 DI delayed status, bit 1). 3
DI3 Digital input DI3 (10.02 DI delayed status, bit 2). 4
DI4 Digital input DI4 (10.02 DI delayed status, bit 3). 5
No. Name/Value Description Def/FbEq16