Software Start-Up and Ref. Owner manual

4-85
Programming Reference
U.026 Current Compounding Gain
This parameter
specifies the gain
applied to the speed
PI output. This is
used to generate the
current compounding
signal that is
subtracted from the
speed loop
reference.
Parameter Range: 0.0 to 1.000
Default Setting: 0.0 (Current compounding disabled)
Parameter Type: Tunable
Refer also to parameters: U.027 Inertia Compensation Gain
U.028 Losses Compensation Gain
Refer to the speed loop block diagram in Appendix G.
U.027 Inertia Compensation Gain
This parameter
specifies the gain
applied to the
selected inertia
compensation source
signal to produce the
inertia compensation
signal. The result is
added to the speed
PI output to produce
the torque reference
signal.
Parameter Range: 0.0 to 5.000
Default Setting: 0.0 (Disable inertia compensation)
Parameter Type: Tunable
Refer also to parameters: U.026 Current Compounding Gain
U.028 Losses Compensation Gain
The inertia compensation signal can be either the S/Ramp (ramp) block rate output
(dv/dt), used for standalone applications, or a value provided directly from the
network option. Signal selection is controlled by a network register. No
corresponding parameter local to the drive is provided.
Inertia compensation can be used with or without an option board installed in the
drive. If a network option is not installed, network inertia compensation is not
enabled, the network is not active or is not the control source (P.000  OP), inertia
compensation is supplied from the S/Ramp block rate output. The signal provided
from the network for inertia compensation is typically used to compensate for inertia
as well as all system losses.
Note that if the selected torque reference is not the speed loop output, then the
inertia compensation circuit does not apply. Refer to the speed loop block diagram
in Appendix G.