Program features
113
Operation time scheme
The time scheme below illustrates the operation of the brake control function. See
also
on page
.
T
s
Start torque at brake release (Parameters
from torque memory
or AI or as per selection of Par.
)
t
md
Motor magnetising delay (Par.
, Constant DC Magn time)
t
od
, Speed reference delay and brake ackn DI
supervision delay)
n
cs
Brake close speed (Parameter
, Absolute brake close speed level)
t
cd
Brake close delay (Parameter
, Torque ON time during closing of mechani-
cal brake and brake ackn DI supervision time)
t
trqpv
Torque proving time period
T
pv
Torque proving reference. Fixed as 30% positive torque reference.
t
extmt
Extended run time (Parameter
, Magnetising ON after brake close)
Start command
Inverter modulating
Motor magnetised
Open brake
command
Internal speed
reference (actual
motor speed)
Torque reference
time
t
od
t
cd
n
cs
T
s
External speed
reference
t
md
1
4
5
6
t
trqpv
Torque proved
7
t
extmt
3
T
pv
20ms
Summary of Contents for ACS 800 Series
Page 1: ...ACS800 Firmware Manual Crane Control Program N697 ...
Page 4: ......
Page 26: ...Start up and control through the I O interface 26 ...
Page 36: ...Quick start up guide 36 ...
Page 52: ...Control panel 52 ...
Page 105: ...Program features 105 Figure Control diagram for Shaft synchronisation executed in 20 ms ...
Page 128: ...Program features 128 ...
Page 150: ...Application macros control location EXT1 EXT2 150 ...
Page 228: ...Actual signals and parameters 228 ...
Page 299: ...Adaptive Programming examples for crane control 299 ...
Page 305: ...Adaptive Programming examples for crane control 305 ...
Page 318: ...Analogue Extension Module 318 ...
Page 332: ...Additional data actual signals and parameters 332 ...
Page 334: ...DriveWindow 334 ...
Page 335: ...Control block diagrams 335 Control block diagrams ...
Page 336: ...Control block diagrams 336 ...
Page 337: ...Control block diagrams 337 ...
Page 338: ...Control block diagrams 338 ...
Page 340: ...www abb com drives www abb com drivespartners Contact us 3AFE68775230 Rev E EN 2012 09 25 ...