Speed Control (Asr) Gain; Gain Adjustment Procedure; Fine Adjustments; Example Monitor Waveforms - YASKAWA VARISPEED-616G5 Instruction Manual

Basic Operation

6.4.5 Speed Control (ASR) Gain

6.4.5 Speed Control (ASR) Gain
6

Gain Adjustment Procedure

J
Use the following procedure to adjust the gain with the mechanical system and actual load connected.
At zero-speed, increase C5-01 (ASR
P Gain 1) until there is no oscillation.
At zero-speed, decrease C5-02 (ASR
I Time 1) until there is no oscillation.
Does oscillation develop when the
motor operates at the maximum nor-
mal operating speed?
Adjustment completed.
(When there is higher-level position
control, adjust the position loop gain
so that overshooting/undershooting
doesn't occur.)
Fig 6.17 Gain Adjustment Procedure

Fine Adjustments

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When you want even finer gain adjustment, adjust the gain while observing the speed waveform.
D
Constant settings like those shown in the following table will be necessary to monitor the speed wave-
D
form.
H4-01 Analog output selection (terminal 21)
H4-02 Analog output gain (terminal 21)
H4-03 Analog output bias (terminal 21)
H4-04 Analog output selection (terminal 23)
H4-05 Analog output gain (terminal 23)
H4-06 Analog output bias (terminal 23)
H4-07 Analog output level selection
The multi-function analog outputs have the following functions with these constant settings.
D
Multi-function analog output 1 (terminal 21): Outputs Inverter's output frequency (0 to ±10 V).
•
Multi-function analog output 2 (terminal 23): Outputs actual motor speed (0 to ±10 V).
•
Terminal 22 is the multi-function analog output common.
We recommend monitoring both the output frequency and the motor speed to monitor the response
D
delay or deviations from the reference value, as shown in the following diagram.
Output frequency
Motor speed
Fig 6.18

Example Monitor Waveforms

YES
Decrease C5-01 (ASR P Gain 1).
NO
Increase C5-02 (ASR I Time 1).
Constant
Motor speed (response)
6 - 38
Setting Explanation
2
Settings that allow multi-function Settings that allow multi-function
1.00
analog output 1 to be used to mon- g p
itor the output frequency. it th t t f
0.0
5
Settings that allow multi-function Settings that allow multi-function
1.00
analog output 2 to be used to mon- g p
it itor the motor speed. th t d
0.0
This setting allows a 0 to ±10 V
1
signal range to be monitored.
Time