YASKAWA GA700 Series

12.4 C: Tuning
706 YASKAWA SIEPC71061705H GA700 Series Technical Manual
When there is no oscillation, the adjustment procedure is complete.
5. Set the low-speed gain. Run the motor at zero speed or low speed and increase C5-03 [ASR Proportional Gain
2] until immediately before vibration starts to occur.
Figure 12.57 Low-speed/High-speed Gain Settings
6. Set the low-speed integral time. Run the motor at zero speed or low speed and decrease C5-04 [ASR Integral
Time 2] until immediately before vibration starts to occur.
7. Set C5-07 [ASR Gain Switchover Frequency].
8. Check for oscillation when you run the motor at speeds more than the setting in C5-07.
Note:
• If overshooting occurs when acceleration ends, decrease the value set in C5-01 and increase the value set in C5-02.
• If undershoot occurs at stop, decrease C5-03 and increase C5-04.
■ Use MFDI Switch for Proportional Gain
Note:
If A1-02 = 1 [Control Method Selection = V/f Control with Encoder], you cannot use this function.
You can use the input terminals set for H1-xx = 77 [ASR Gain (C5-03) Select] to switch the proportional gains set
with C5-01 [ASR Proportional Gain 1] and C5-03 [ASR Proportional Gain 2]. When the configured input
terminal deactivates, it selects the proportional gain set for C5-01. When the terminal is activated, the proportional
gain set for C5-03 is selected. The proportional gain changes linearly over the time set in C5-02 [ASR Integral
Time 1]. The signals from this MFDI are more important than C5-07 [ASR Gain Switchover Frequency].
Figure 12.58 Proportional Gain through Multi-function Digital Input Switch
■ Speed Waveform Monitoring Method
To make small adjustments of ASR parameters, monitor the speed waveforms when you make the adjustments.
Table 12.36 shows example settings of parameters to monitor speed waveforms.
Table 12.36 Example Settings of MFAO Terminals to Monitor Speed Waveforms
No. Name Setting Value Description
H4-01 Terminal FM Analog Output Select 116 Lets you use terminal FM to monitor U1-
16 [SFS Output Frequency].
H4-02 Terminal FM Analog Output Gain 100.0%
H4-03 Terminal FM Analog Output Bias 0.0%
H4-04 Terminal AM Analog Output Select 105 Lets you use terminal AM to monitor U1-
05 [Motor Speed].
H4-05 Terminal AM Analog Output Gain 50.0%
H4-06 Terminal AM Analog Output Bias 0.0%
H4-07 Terminal FM Signal Level Select 1 Lets you monitor in a -10 V to +10 V
range.
H4-08 Terminal AM Signal Level Select 1
These settings cause this MFAO configuration. The MFAO common is terminal AC: