Parameter Details
12
12.4 C: Tuning
YASKAWA SIEPC71061753C GA500 Technical Manual 563
Item Heavy Duty Rating (HD) Normal Duty Rating (ND)
Overload Tolerance 150% - 60 seconds 110% - 60 seconds
Stall Prevent Level during Accel 150% 120%
Stall Prevent Level during Run 150% 120%
Carrier Frequency 2 kHz 2 kHz Swing-PWM
Note:
• Set the stall prevention level during acceleration with L3-02 and the stall prevention level during run with L3-06.
• Changing C6-01 also changes the maximum capacity of applicable drive motors. The drive automatically changes the setting values
E2-xx and E4-xx to applicable values. The drive also automatically changes these parameters that depend on motor output:
–b8-04 [Energy Saving Coefficient Value]
–L2-03 [Minimum Baseblock Time]
–L3-24 [Motor Accel Time @ Rated Torque]
–n5-02 [Motor Inertia Acceleration Time]
■ C6-02: Carrier Frequency Selection
No.
(Hex.)
Name Description
Default
(Range)
C6-02
(0224)
Carrier Frequency Selection
Sets the carrier frequency for the transistors in the drive.
Determined by A1-02, C6-
01, and o2-04
(Determined by A1-02)
Changes to the switching frequency will decrease audible noise and decrease leakage current.
Note:
Increasing the carrier frequency to more than the default setting will automatically decrease the drive current rating.
1 : 2.0 kHz
2 : 5.0 kHz (AOLV/PM: 4.0 kHz)
3 : 8.0 kHz (AOLV/PM: 6.0 kHz)
4 : 10.0 kHz (AOLV/PM: 8.0 kHz)
5 : 12.5 kHz (AOLV/PM: 10.0 kHz)
6 : 15.0 kHz (AOLV/PM: 12.0 kHz)
7 : Swing PWM4 (Audible Sound 1)
8 : Swing PWM4 (Audible Sound 2)
9 : Swing PWM4 (Audible Sound 3)
A : Swing PWM4 (Audible Sound 4)
B : Leakage Current Rejection PWM
Set this when the wiring distance between the drive and motor is long and there is a fault in the current monitor or
the drive detects and alarm because of the effect of a leakage current.
The carrier frequency is equivalent to 2.0 kHz.
F : User Defined (C6-03 to C6-05)
Use C6-03 to C6-05 to set detailed setting values.
Note:
• The setting range changes when the A1-02 [Control Method Selection] value changes:
–5, 8 [OLV/PM, EZOLV]: You can set C6-02 = 1 to 6, B, and F.
–6 [AOLV/PM]: You can set C6-02 = 1 to 6.
• The carrier frequency for Swing PWM 1 is equivalent to 2.0 kHz. Swing PWM applies a special PWM pattern to decrease the audible
noise.
Table 12.40 Guidelines for Carrier Frequency Parameter Setup
Symptom Remedy
Speed and torque are not stable at low speed. Decrease the carrier frequency.
Speed and torque are not stable at low speed. Decrease the carrier frequency.
Too much leakage current from the drive. Decrease the carrier frequency.
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