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ABB ACS355 series - Operation Time Scheme

ABB ACS355 series
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160 Program features
Operation time scheme
The time scheme below illustrates the operation of the brake control function. See
also section State shifts on page 161.
t
od
t
cd
n
cs
t
md
1
2
3
4
7
I
s
/T
s
I
mem
/T
mem
Inverter modulating
Motor magnetized
Open brake command
(RO/DO)
Internal speed
reference (actual
motor speed)
I
output
/ Torque
External speed
reference
Start command
t
I
s
/T
s
Brake open current/torque (parameter 4302 BRAKE OPEN LVL or
current/torque from parameter 0179 BRAKE TORQ MEM)
I
mem
/T
mem
Brake close current/torque (saved in parameter 0179 BRAKE TORQ MEM)
t
md
Motor magnetizing delay (parameter 4305 BRAKE MAGN DELAY)
t
od
Brake open delay (parameter 4301 BRAKE OPEN DLY)
n
cs
Brake close speed (parameter 4303 BRAKE CLOSE LVL)
t
cd
Mechanical brake close delay

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