YASKAWA A1000 HHP Programming Manual page 42

1.2 b: Application
No.
b5-35
n b5-38, b5-39: PID Setpoint User Display, PID Setpoint Display Digits
When parameter b5-20 is set to 3, parameters b5-38 and b5-39 set a user-defined display for the PID setpoint (b5-19) and PID
feedback monitors (U5-01, U5-04).
Parameter b5-38 determines the display value when the maximum frequency is output and parameter b5-39 determines the
number of digits. The setting value is equal to the number of decimal places.
No.
b5-38
b5-39
Setting 0: No Decimal Places
Setting 1: One Decimal Place
Setting 2: Two Decimal Places
Setting 3: Three Decimal Places
n b5-40: Frequency Reference Monitor Content During PID
Sets the content of the frequency reference monitor display (U1-01) when PID control is active.
No.
b5-40 Frequency Reference Monitor Content During PID
Setting 0: Frequency Reference after PID
Monitor U1-01 displays the frequency reference increased or reduced for the PID output.
Setting 1: Frequency Reference
Monitor U1-01 displays the frequency reference value.
n Fine-Tuning PID
Follow the directions below to fine tune PID control parameters:
Goal
Suppress overshoot
Achieve stability quickly while
allowing some overshoot
42
Name
PID Input Limit
Name
PID Setpoint User Display
PID Setpoint Display Digits
Name
Table 1.22 PID Fine Tuning
Tuning Procedure
• Reduce the derivative time (b5-05)
• Increase the integral time (b5-03)
• Decrease the integral time (b5-03)
• Increase the derivative time (b5-05)
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Setting Range
0.0 to 1000.0%
Setting Range
1 to 60000
0 to 3
Setting Range
0, 1
Result
Response
Response
Default
1000.0%
Default
Determined by
b5-20
Determined by
b5-20
Default
0
Before adjustment
After adjustment
Time
After adjustment
Before adjustment
Time