ABB ACSM1 - Page 56

Drive control and features
56
Mechanical brake state diagram
CLOSE
BRAKE
From any state
0/1/1/0
1/1/1/1
1)
2)
3)
6)
7)
11)
12)
13)
5)
0/0/1/1
8)
State (Symbol )
- NN: State name
- W/X/Y/Z: State outputs/operations
W: 1 = Brake open command is active. 0 = Brake close command is active. (Controlled through selected digital/relay output with signal 3.15 BRAKE
COMMAND.)
X: 1 = Forced start (inverter is modulating). The function keeps the internal Start command on until the brake is closed regardless of the status of the
external Stop. Effective only when ramp stop has been selected as the stop mode (11.03 STOP MODE). Run enable and faults override the forced
start. 0 = No forced start (normal operation).
Y: 1 = Drive control mode is forced to speed/scalar.
Z: 1 = Ramp generator output is forced to zero. 0 = Ramp generator output is enabled (normal operation).
NN
W/X/Y/Z
State change conditions (Symbol )
1) Brake control is active (35.01 BRAKE CONTROL = (1) WITH ACK or (2) NO ACK) OR modulation of the drive is requested to stop. The drive
control mode is forced to speed/scalar.
2) External start command is on AND brake open request is on (source selected by 35.07 BRAKE CLOSE REQ = 0).
3) Starting torque required at brake release is reached (35.06 BRAKE OPEN TORQ) AND brake hold is not active (35.08 BRAKE OPEN HOLD).
Note: With scalar control, the defined starting torque has no effect.
4) Brake is open (acknowledgement = 1, selected by par. 35.02 BRAKE ACKNOWL) AND the brake open delay has passed (35.03 BRAKE OPEN
DELAY). Start = 1.
5) 6) Start = 0 OR brake close command is active AND actual motor speed < brake close speed (35.05 BRAKE CLOSE SPD).
7) Brake is closed (acknowledgement = 0) AND brake close delay has passed (35.04 BRAKE CLOSE DLY). Start = 0.
8) Start = 1.
9) Brake is open (acknowledgement = 1) AND brake close delay has passed.
10) Defined starting torque at brake release is not reached.
11) Brake is closed (acknowledgement = 0) AND brake open delay has passed.
12) Brake is closed (acknowledgement = 0).
13) Brake is open (acknowledgement = 1) AND brake close delay has passed.
0/1/1/1
Fault/Alarm*
BRAKE NOT CLOSED
9)
Fault/Alarm*
BRAKE START TORQUE
10)
4)
BSM = Brake State
Machine
* Depends on setting of
par. 35.09 BRAKE
FAULT FUNC.
BSM STOPPED
BSM
START
1/1/0/0
RELEASE
RAMP
OPEN
BRAKE
Fault/Alarm*
BRAKE NOT CLOSED
Fault/Alarm*
BRAKE NOT OPEN