YASKAWA CIPR-GA50C series, Technical Manual

Page: 535 / 766

Parameter
Details
12
12.4 C: Tuning
YASKAWA SIEPC71061753A GA500 Technical Manual 535
If the motor rated slip is high, it is necessary to increase the setting for correct motor speed control. Use U6-04
[ASR Output] to make sure that ASR is operating at the limit set in this parameter. When ASR is operating at the
limit, correctly set the encoder (PG) signal before you make changes to C5-05 .
Note:
When A1-02 = 0 [Control Method Selection = V/f] , set H6-01 = 3 [Terminal RP Pulse Train Function = Speed Feedback (V/F Control)]
to enable this parameter.
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C5-06: ASR Delay Time
No.
(Hex.)
Name Description
Default
(Range)
C5-06
(0220)
ASR Delay Time
Sets the filter time constant of the torque reference output from the speed loop. Usually it is not
necessary to change this setting.
Determined by A1-02
(0.000 - 0.500 s)
If you have a load with low rigidity or if oscillation is a problem, decrease C5-01 in 2-unit decrements or decrease
C5-06 in 0.001-unit decrements.
■
C5-07: ASR Gain Switchover Frequency
No.
(Hex.)
Name Description
Default
(Range)
C5-07
(0221)
ASR Gain Switchover
Frequency
Sets the frequency where the drive will switch between these parameters:
C5-01 and C5-03 [ASR Proportional Gain 1/2]
C5-02 and C5-04 [ASR Integral Time 1/2]
Determined by A1-02
(Determined by A1-02)
Switching the proportional gain and integral time in the low or high speed range can help operation become
stable. A good switching point is 80% of the frequency where oscillation occurs or at 80% of the maximum output
frequency.
Note:
An MFDI set for H1-xx = 77 [MFDI Function Selection = ASR Gain (C5-03) Select] will have priority over the ASR gain switching
frequency.
■
C5-08: ASR Integral Limit
No.
(Hex.)
Name Description
Default
(Range)
C5-08
(0222)
ASR Integral Limit
Set the upper limit of the ASR integral amount as a percentage of the rated load.
400%
(0 - 400%)
■
C5-12: Integral Operation @ Accel/Decel
No.
(Hex.)
Name Description
Default
(Range)
C5-12
(0386)
Integral Operation @
Accel/Decel
Sets ASR integral operation during acceleration and deceleration.
0
(0, 1)
Set this parameter to 1 to keep the motor speed near the frequency reference during operation and acceleration/
deceleration.
Note:
• When A1-02 = 0 [Control Method Selection = V/f] , set H6-01 = 3 [Terminal RP Pulse Train Function = Speed Feedback (V/F
Control)] to enable this parameter.
•
If you enable integral control, overshoot or undershoot can occur when acceleration or deceleration complete. If there are problems
with overshooting and undershooting, set this parameter to
0 .
0 : Disabled
The drive will not enable integral operation during acceleration or deceleration. The drive always enables integral
operation during constant speed.
1 : Enabled
Integral operation is always enabled.
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV