Yaskawa G7 Drive - Manual (Page 110)

Adjustment Suggestions
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Table 4.5 Parameters Indirectly Affecting Control and Applications
Name (Parameter Number) Application
Dwell function (b6-01 to b6-04) Used for heavy loads or large machine backlashes.
Droop function (b7-01 to b7-02)
Used to soften the torque or to balance the load between two motors. Can
be used when the control mode (A1-02) is set to 3 or 4.
Acceleration/deceleration times
(C1-01 to C1-11)
Adjust torque during acceleration and deceleration.
S-curve characteristics (C2-01 to C2-04) Used to prevent shock when completing acceleration.
Jump frequencies (d3-01 to d3-04) Used to avoid resonance points during operation.
Analog input filter time constant (H3-12) Used to prevent fluctuations in analog input signals caused by noise.
Stall prevention (L3-01 to L3-06)
Used to prevent 0 V (overvoltage errors) and motor stalling for heavy
loads or rapid acceleration/deceleration. Stall prevention is enabled by
default and the setting does not normally need to be changed. When using
a braking resistor, however, disable stall prevention during deceleration
by setting L3-04 to 0.
Torque limits (L7-01 to L7-04)
Set the maximum torque during vector control. If a setting is increased,
use a motor with higher capacity than the Drive. If a setting is reduced,
stalling can occur under heavy loads.
Feed forward control (N5-01 to N5-03)
Used to increase response for acceleration/deceleration or to reduce over-
shooting when there is low machine rigidity and the gain of the speed
controller (ASR) cannot be increased. The inertia ratio between the load
and motor and the acceleration time of the motor running alone must be
set.