YASKAWA G7 Series Technical Manual page 349

Fine Adjustments
When you want even finer gain adjustment, adjust the gain while observing the speed waveform. Parameter
settings like those shown in the following table will be necessary to monitor the speed waveform.
Parameter
No.
H4-01 Multi-function analog output 1 terminal FM monitor selection
H4-02 Multi-function analog output 1 terminal FM output gain
H4-03 Multi-function analog output 1 terminal FM bias
H4-04 Multi-function analog output 2 terminal AM monitor selection
H4-05 Multi-function analog output 2 terminal AM output gain
H4-06 Multi-function analog output 2 terminal AM bias selection
H4-07 Multi-function analog output 1 terminal signal level selection
H4-08 Multi-function analog output 2 terminal signal level selection
The multi-function analog outputs have the following functions with these parameter settings.
Multi-function analog output 1 (terminal FM): Outputs Drive's output frequency (0 to ±10 V).
•
Multi-function analog output 2 (terminal AM): Outputs actual motor speed (0 to ±10 V).
•
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.
Motor speed
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Name
The proportional gain is high.
(Oscillation occurs when the gain is too high.)
The proportional gain is low.
Fig 6.68 Responsiveness for Proportional Gain
Individual Functions
Setting Explanation
2
Settings that allow multi-func-
1.00 tion analog output 1 to be used
to monitor the output frequency.
0.0
5
Settings that allow multi-func-
1.00 tion analog output 2 to be used
to monitor the motor speed.
0.00
1
Settings that allow a 0 to ±10V
signal range to be monitored.
1
Time
131
6-