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9.2.4. Integrator Limiter : ILV
l
Parameter “ILV” sets the upper limit to the velocity gain. Shipping set is ILV100.
l
The password is necessary when setting “ILV”.
l
Integrator limiter reduces overshoot caused by the integral action during high acceleration /
deceleration.
l
The integral action is indispensable for high-precision positioning. However, when a high-
speed acceleration/deceleration is specified, errors are likely to accumulate so that integration
often results in an overshoot. To prevent this, an integrator limiter is provided to restrict an
excessive integration.
* For more details about the parameter, refer to “12.1. Command and Parameter.”
Figure 9-18: Integrator limiter block diagram
Position
command
Velocity
loop gain
Position
loop gain
Position data
Velocity loop integrator
Integrator
limiter
+
–
Velocity data
+
–
Integrator
frequency
ILV
VI
VG
PG
Figure 9-19
ILV
[%]
Error
Integration gain
ILV
[%]
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