Adjusting Speed Control (Asr) Gain; Gain Adjustments At Minimum Output Frequency; Gain Adjustments At Maximum Output Frequency; Gain Adjustments For Integral Control During Acceleration/Deceleration - YASKAWA VARISPEED-616G5 Instruction Manual

Figure 6.22 shows how the proportional gain and integral time are calculated from constants C5-01
D
through C5-04.
P, I
0
Fig 6.22
Multi-function Input Settings: H1-01 (Terminal 3) to H1-06 (Terminal 8)
J
No Flux V/f Speed Control Selection: "D"
When one of the multi-function inputs is set to "D," the input can be used to enable and disable the
D
speed control.
The speed control is disabled (normal V/f control) when the multi-function input is ON.
D
ASR Integral Reset Setting: "E"
When one of the multi-function inputs is set to "E," the input can be used to switch the speed control
D
between P control and PI control.
P control (integral reset) is used when the multi-function input is ON.
D

6.5.5 Adjusting Speed Control (ASR) Gain

Use the following procedure to adjust the gain with the mechanical system and actual load connected.

Gain Adjustments at Minimum Output Frequency

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1. Operate the motor at the minimum output frequency.
2. Increase C5-03 (ASR proportional gain 2) to a level where there is no oscillation.
3. Decrease C5-04 (ASR integral time 2) to a level where there is no oscillation.
4. Monitor the Inverter's output current and verify that it is less than 50% of the Inverter rated current.
If the output current exceeds 50% of the Inverter's rated current, decrease C5-03 and increase C5-04.

Gain Adjustments at Maximum Output Frequency

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1. Operate the motor at the maximum output frequency.
2. Increase C5-01 (ASR proportional gain 1) to a level where there is no oscillation.
3. Decrease C5-02 (ASR integral time 1) to a level where there is no oscillation.

Gain Adjustments for Integral Control during Acceleration/Deceleration

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Enable integral operation during acceleration and deceleration (with F1-07) when you want the motor
D
speed to closely follow the frequency reference during acceleration and deceleration. Integral opera-
tion causes the speed to reach the target speed as fast as possible, but may result in overshooting or
undershooting.
1. Set F1-07 to "1" to enable integral operation at all times.
2. Make the constant settings shown below in order to observe the speed waveform while making fine
adjustments to the gain.
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)
H4-07Analog output level selection
E1-04
(Max. output frequency)
Minimum Output Frequency Gain Settings
Constant
6 - 45
6.5 V/f Control with PG
P= C5-01
I = C5-02
P= C5-03
I = C5-04 (Min. output frequency)
Motor speed (Hz)
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
it itor the output frequency. 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
0.0
This setting allows a 0 to ±10 V
1
signal range to be monitored.
6
d