ABB ACS880 Firmware Manual page 444

444 Parameters
No. Name/Value
79.33 Fixed inertia
0.0000...
32767.000 kgm
79.34 Full roll weight
0.0...65535.0 kg
79.41 Acceleration comp
gain
0.00... 10.00
79.42 Deceleration comp
gain
0.00... 10.00
79.43 Steady-speed comp
gain
0.00... 10.00
79.48 Min line speed step
0.00... 100.00%/s
79.49 IC filter time
0...32767 ms
79.51 Actual motor speed
%
0.00...100.00%
79.55 Friction torque used
%
-100.00...100.00%
Description
Defines the fixed inertia including the inertia of the motor,
shaft and gearing. Inertia of the shaft and gearbox must be
reflected on the motor side.
Fixed inertia =
Motor inertia
For correct values, see
on page 671.
Fixed inertia.
2
Defines the weight of the complete roll.
Note: This parameter is used only when parameter
Inertia calculation method
weight and Actual
Weight of the full roll.
Defines torque reference multiplier applied to parameter
79.65 Inertial torque demand %
accelerating.
Torque reference multiplier.
Defines torque reference multiplier applied to parameter
79.65 Inertial torque demand %
decelerating.
Torque reference multiplier.
Defines torque reference multiplier applied to parameter
79.65 Inertial torque demand %
reference does not change. But compensation torque is
generated to support motor speed transition as roll diameter
changes.
Torque reference multiplier.
Defines absolute minimum line speed reference step for the
inertia compensation function to distinguish between steady-
speed state and acceleration/deceleration.
Example: If parameter
and this value is set to 0.1%/s, then speed change lower
than 0.1% of 2000 = 2 m/min/s will not be considered as
acceleration or deceleration, but will be interpreted as
reference fluctuations in steady-speed state.
Percentage of minimum line speed change per second.
Defines the filter time for inertia compensation torque
reference. Filtering helps to reduce undesired torque spikes
that can occur at sudden speed reference changes.
Filter time.
Displays actual motor speed in % of
at core.
This parameter is read-only.
Speed in %.
Displays friction torque added to the final torque reference.
This parameter is read-only.
Final torque reference in %.
Gear inertia + Shaft inertia
+
Gear ratio
Appendix A: Motor rotor inertia, IEC
is set to Scaled to 79.34 Full roll
Diameter.
input while line speed is
input while line speed is
input while line speed
75.01 Max line speed
75.61 Max motor speed
Def/FbEq16
0.0000 kgm
2
1000 =
1 kgm
0.0 kg
79.32
10 = 1 kg
1.00
100 = 1
1.00
100 = 1
0.25
100 = 1
0.00%/s
= 2000 m/min
100 = 1%/s
10 ms
1 = 1 ms
0.00%
100 = 1%
0.00%
100 = 1%
2
2