ABB ACSM1 - Page 164

Parameters and firmware blocks
164
35.03 BRAKE OPEN DELAY FW block: MECH BRAKE CTRL (see above)
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 35.06 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…5 s Brake open delay.
35.04 BRAKE CLOSE DLY FW block: MECH BRAKE CTRL (see above)
Defines the brake close delay. The delay counter starts when the motor actual speed has fallen below
the set level (parameter 35.05 BRAKE CLOSE SPD) 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…60 s Brake close delay.
35.05 BRAKE CLOSE SPD FW block: MECH BRAKE CTRL (see above)
Defines the brake close speed (an absolute value). See parameter 35.04 BRAKE CLOSE DLY.
0…1000 rpm Brake close speed.
35.06 BRAKE OPEN TORQ FW block: MECH BRAKE CTRL (see above)
Defines the motor starting torque at brake release (in percent of the motor nominal torque).
0…1000% Motor starting torque at brake release.
35.07 BRAKE CLOSE REQ FW block: MECH BRAKE CTRL (see above)
Selects the source for the brake close (open) request. 1 = Brake close request. 0 = Brake open
request.
Note: This parameter cannot be changed while the drive is running.
Bit pointer: Group, index and bit
35.08 BRAKE OPEN HOLD FW block: MECH BRAKE CTRL (see above)
Selects the source for the activation of the brake open command hold. 1 = Hold active. 0 = Normal
operation.
Note: This parameter cannot be changed while the drive is running.
Bit pointer: Group, index and bit
35.09 BRAKE FAULT FUNC FW block: MECH BRAKE CTRL (see above)
Defines how the drive reacts in case of mechanical brake control error. If brake control supervision
has not been activated by parameter 35.01 BRAKE CONTROL, this parameter is disabled.