Omron VARISPEED G7 -, Instruction Manual

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Individual Functions
6-
125
Terminal AC is the multi-function analog output common.
We recommend monitoring both the output frequency and the motor speed to monitor the response delay or
deviations from the reference value, as shown in the following diagram.
Adjusting ASR Proportional Gain 1 (C5-01)
This gain setting adjusts the responsiveness of the speed control (ASR). The responsiveness is increased when
this setting is increased. Usually this setting is higher for larger loads. Oscillation will occur if this setting is
increased too much.
The following diagram shows the type of changes that can occur in the response when the ASR proportional
gain is changed.
Fig 6.68 Responsiveness for Proportional Gain
Adjusting ASR Integral Time 1 (C5-02)
This constant sets the speed control (ASR) integral time.
Lengthening the integral time lowers the responsiveness, and weakens the resistance to external influences.
Oscillation will occur if this setting is too short. The following diagram shows the type of changes that can
occur in the response when the ASR integral time is changed.
Fig 6.69 Responsiveness for Integral Time
Motor speed
Time
The proportional gain is high.
(Oscillation occurs when the gain is too high.)
The proportional gain is low.
Motor speed
Time
Short integral time
Long integral time