ABB ACS880 Firmware Manual page 420

420 Parameters
No. Name/Value
75.05 Line ref source
cycle time
0...32767 ms
75.11 Acceleration ramp
time
0.00...32767.00 s
75.12 Deceleration ramp
time
0.00...32767.00 s
75.13 Stop ramp time
0.00...32767.00 s
75.21 Thread forward
command
Not selected
Selected
DI1
DI2
DI3
DI4
Description
Defines the remote control system cycle time, meaning how
often the line speed reference is updated. This helps
absorbing the speed reference steps (see diagram below)
that occurs due to acyclic communication delays.
This value should be the longest period of time taken for the
control system to transmit speed reference data to the drive.
Note: This value is required to be accurate for Inertia
compensation and to avoid torque reference spikes.
Speed reference
Speed
reference
75.05
Line ref source
cycle time
t
A
Cycle time.
Defines the time for the line speed reference to increase
from zero to the value defined with parameter
speed.
Ramp time for acceleration.
Defines the time for the line speed reference to decrease
from the value defined with parameter
to zero. This setting is active while the drive start command
is TRUE.
Ramp time for deceleration.
Defines the time within which line speed reference
decelerates to zero from the value defined with parameter
75.01 Max line speed in case of stop command. This setting
is active while the drive start command is FALSE.
Note: This setting is valid only when parameter
mode = Ramp.
Stop ramp time.
Defines the source for the command to generate line speed
reference in positive direction. Speed reference used in that
instance is set in parameter
ref.
See also Threading on page 48.
Line speed reference is not activated.
Line speed reference is activated.
Digital input DI1 (10.02 DI delayed
Digital input DI2 (10.02 DI delayed
Digital input DI3 (10.02 DI delayed
Digital input DI4 (10.02 DI delayed
75.51 Line reference In
75.01 Max line
75.01 Max line speed
21.03 Stop
75.23 Threading forward line
status, bit 0).
status, bit 1).
status, bit 2).
status, bit 3).
Def/FbEq16
6 ms
Time
1 = 1 ms
60.00 s
100 = 1 s
60.00 s
100 = 1 s
60.00 s
100 = 1 s
Not selected
0
1
2
3
4
5