Omron VARISPEED G7 Instruction Manual page 104

Table 4.5 Constants Indirectly Affecting Control and Applications(Continued)
Name (Constant Number)
Jump frequencies (d3-01 to d3-04)
Analog input filter time constant (H3-12)
Stall prevention (L3-01 to L3-06)
Torque limits (L7-01 to L7-04)
Feed forward control (N5-01 to N5-03)
Application
Used to avoid resonance points during operation.
Used to prevent fluctuations in analog input signals caused by noise.
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.
Set the maximum torque during vector control. If a setting is increased,
use a motor with higher capacity than the Inverter. If a setting is reduced,
stalling can occur under heavy loads.
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.
Adjustment Suggestions
4-
19