5.2 b: Application
156 YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual
Setting 1: Frequency Reference
Monitor U1-01 displays the frequency reference value.
■
Fine-Tuning PI
Once PI control parameters have been set, fine-tuning may be required. Follow the directions below.
Table 5.11 PI Fine Tuning
■ b5-41: PI Unit Selection
Sets the display units in U5-14 and U5-15.
0: WC (Inch of Water)
1: PSI (ib/Sq inch)
2: GPM (Gallons/min)
3: F (Deg Fahrenheit)
4: CFM (Cubic ft/min)
5: CMH (Cubic M/h)
6: LPH (Liters/h)
7: LPS (Liters/s)
8: Bar (Bar)
9: Pa (Pascal)
10: C (Deg Celsius)
Goal Tuning Procedure Result
Overshoot must be suppressed • Increase the integral time (b5-03)
Quickly achieve stability, and some
overshoot is permissible
• Decrease the integral time (b5-03)
Suppress long cycle oscillations (longer than
the integral time setting)
• Increase the integral time (b5-03)
Suppress short cycle oscillations
• Reduce the proportional gain (b5-02) or increase
the PI primary delay time (b5-08)
No. Name Setting Range Default
b5-41 PI Unit Selection 0 to 14 0
Response
Before adjustment
After adjustment
Time
Response
Before adjustment
After adjustment
Time
Response
Before adjustment
After adjustment
Time
Response
After adjustment
Before adjustment
Time
SIEP_C710616_35.book 156 ページ ２０１５年１１月３０日 月曜日 午後２時２分
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