YASKAWA GA800 Technical Reference page 785

Table 12.32 Example Settings of MFAO Terminals to Monitor Speed Waveforms
No.
H4-01
H4-02
H4-03
H4-04
H4-05
H4-06
H4-07
H4-08
These settings cause this MFAO configuration. The MFAO common is terminal AC:
• Terminal FM: Outputs the output frequency after SFS in a -10 V to +10 V (-100% to +100%) range.
• Terminal AM: Outputs the motor speed in a -10 V to +10 V (-200% to +200%) range.
Yaskawa recommends that you monitor the output frequency after SFS and the motor speed for delays in response
and differences in reference values.
■
Adjust ASR Parameters
Use Table 12.33 to adjust ASR. The table lists parameters for motor 1. You can make the same changes to motor 2
parameters when you run a second motor.
Note:
When adjusting the proportional gain and integral time, adjust the proportional gain first.
Speed response is slow.
Overshoot or undershoot occurs at the end of acceleration
or deceleration.
Vibration and oscillation occur at constant speed.
Speed accuracy is unsatisfactory when you operate a motor
that has a large quantity of rated slip in Closed Loop V/f
Control.
YASKAWA SIEPC71061737D GA800 Drive Technical Reference
Name
Terminal FM Analog Output Select
Terminal FM Analog Output Gain
Terminal FM Analog Output Bias
Terminal AM Analog Output Select
Terminal AM Analog Output Gain
Terminal AM Analog Output Bias
Terminal FM Signal Level Select
Terminal AM Signal Level Select
Table 12.33 ASR Response and Possible Solutions
Problem
Setting Value
116 Lets you use terminal FM to monitor U1-16
[SFS Output Frequency].
100.0%
0.0%
105 Lets you use terminal AM to monitor U1-05
[Motor Speed].
50.0%
0.0%
1 Lets you monitor in a -10 V to +10 V range.
1
Possible Solutions
• Increase C5-01/C5-03 [ASR Proportional Gain].
• Decrease C5-02/C5-04 [ASR Integral Time].
• Decrease C5-01/C5-03.
• Increase C5-02/C5-04.
• Decrease C5-01/C5-03.
• Increase C5-02/C5-04.
• Increase C5-06 [ASR Delay Time].
• Examine the pulse number set to F1-01 [Encoder 1
Pulse Count (PPR)] and the gear ratio to F1-12
[Encoder 1 Gear Teeth 1] and F1-13 [Encoder 1 Gear
Teeth 2].
• Make sure that you correctly set the pulse signal from
the encoder.
• Examine U6-04 [ASR Output] to make sure that the
ASR operates at its output limit set to C5-05 [ASR
Limit]. If the ASR is at the output limit, increase C5-05.
12.4 C: Tuning
Description
12
785