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Program features 73
Timing diagram
The simplified timing diagram below illustrates the operation of the brake control
function. Refer to the state diagram above.
T
s
Start torque at brake open (parameter
)
T
mem
Stored torque value at brake close (
)
t
md
Motor magnetization delay
t
od
Brake open delay (parameter
)
n
cs
Brake close speed (parameter
t
ccd
Brake close command delay (parameter
)
t
cd
t
cfd
Brake close fault delay (parameter
)
t
rod
BOW
BOD
BCW
BCD
Start command
b5)
Modulating (
b6)
T
mem
1
2
3
4
5
6
7
8
9
Ready ref (
b2)
Torque reference
Speed reference
Brake control signal
Opening torque
request (
b1)
Ramp to stopped
request (
b3)
Hold stopped request
b2)
t
od
T
s
n
cs
t
ccd
t
cd
t
cfd
t
rod
State
BOW
BOD
BCW
BCD
t
md
Summary of Contents for ACS880-x04
Page 1: ... ABB INDUSTRIAL DRIVES ACS880 primary control program Firmware manual ...
Page 4: ......
Page 18: ...18 Using the control panel ...
Page 24: ...24 Control locations and operating modes ...
Page 112: ...112 Application macros ...
Page 496: ...496 Additional parameter data ...
Page 544: ...544 Fault tracing ...
Page 602: ...602 Control chain diagrams ...