Actual signals and parameters
181
22.03
DECEL TIME 1
Defines the deceleration time 1, that is the time required for the speed to
change from the maximum (see parameter
) to zero.
- If the speed reference decreases slower than the set deceleration rate, the
motor speed will follow the reference signal.
- If the reference changes faster than the set deceleration rate, the motor
speed will follow the deceleration rate.
- If the deceleration time is set too short, the drive will automatically prolong the
deceleration in order not to exceed drive operating limits. If there is any doubt
about the deceleration time being too short, ensure that the DC overvoltage
control is on (parameter
Note:
If a short deceleration time is needed for a high inertia application, the
drive should be equipped with an electric braking option, for example, with a
brake chopper and a brake resistor.
0.00 … 1800.00 s
Deceleration time
0 … 18000
22.04
ACCEL TIME 2
See parameter
0.00 … 1800.00 s
See parameter
0 … 18000
22.05
DECEL TIME 2
See parameter
0.00 … 1800.00 s
See parameter
0 … 18000
22.06
ACC/DEC RAMP
SHPE
Selects the shape of the acceleration/deceleration ramp.
0.00 … 1000.00 s
0.00 s: Linear ramp. Suitable for steady acceleration or deceleration and for
slow ramps.
0.01 … 1000.00 s: S-curve ramp. S-curve ramps are ideal for conveyors
carrying fragile loads, or other applications where a smooth transition is
required when changing from one speed to another. The S curve consists of
symmetrical curves at both ends of the ramp and a linear part in between.
0 … 10000
22.07
EM STOP RAMP
TIME
Defines the time inside which the drive is stopped if
- the drive receives an emergency Stop command or
- the Run Enable signal is switched off and the Run Enable function has value
OFF3 (see parameter
The emergency Stop command can be given through a fieldbus or an
Emergency Stop module (optional). Consult the local ABB representative for
more information on the optional module and the related settings of the
Standard Application Program.
0.00 … 2000.00 s
Deceleration time
0 … 20000
Index
Name/Selection
Description
FbEq
= 0 s
S-curve ramp:
Par.
A rule of thumb
A suitable relation between the
ramp shape time and the
acceleration ramp time is 1/5.
Speed
time
Max
Par.
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 ...