Operation Time Scheme - ABB ACS350 User Manual

Operation time scheme

The time scheme below illustrates the operation of the brake control function. See
also section
Start command
External speed
reference
Inverter modulating
Motor magnetised
Open brake
command (RO/DO)
Internal speed
reference (actual
motor speed)
I / Torque
output
I /T
s s
t
md
t
od
n
cs
t
cd
State shifts on page 128.
1
2
t
md
t
3
od
I /T
S S
Brake open current/torque (4302)
Motor magnetising delay (parameter 4305)
Brake open delay (parameter 4301)
Brake close speed (parameter 4303)
Mechanical brake close delay
4
7
n
cs
t
cd
127
t
Program features