Yaskawa Z1000 AC Drive HVAC - Manual (Page 127)

No. Parameter Name Setting Range Default
C6-02 Carrier Frequency Selection 1 to 9; A to F Determined by A1-02 and o2-04
Settings:
C6-02 Carrier Frequency C6-02 Carrier Frequency C6-02 Carrier Frequency
1 2.0 kHz 5 12.5 kHz 9 Swing PWM 3
2 5.0 kHz 6 15.0 kHz A Swing PWM 4
3 8.0 kHz 7 Swing PWM 1 B to E No setting possible
4 10.0 kHz 8 Swing PWM 2 F User defined
Note: Swing PWM uses a carrier frequency of 2.0 kHz as a base, then applies a special PWM pattern to reduce the audible noise.
Guidelines for Carrier Frequency Parameter Setup
Symptom Remedy
Speed and torque are unstable at low speeds
Lower the carrier frequency.
Noise from the drive affects peripheral devices
Excessive leakage current from the drive
Wiring between the drive and motor is too long
<1>
Audible motor noise is too loud Increase the carrier frequency or use Swing PWM.
<1> The carrier frequency may need to be lowered if the motor cable is too long. Refer to the following table.
Wiring Distance Up to 50 m Up to 100 m Greater than 100 m
Recommended setting value for C6-02 1 to F (up to 15 kHz)
1 to 2 (up to 5 kHz),
7 (Swing PWM)
1 (up to 2 kHz), 7 (Swing PWM)
Note: The maximum cable length is 100 m when using OLV/PM (A1-02 = 5).
n d2-01: Frequency Reference Upper Limit
Sets the maximum frequency reference as a percentage of the maximum output frequency. This limit applies to all frequency
references.
Even if the frequency reference is set to a higher value, the drive internal frequency reference will not exceed this value.
No. Parameter Name Setting Range Default
d2-01 Frequency Reference Upper Limit 0.0 to 110.0% 100.0%
n d2-02: Frequency Reference Lower Limit
Sets the minimum frequency reference as a percentage of the maximum output frequency. This limit applies to all frequency
references.
If a lower reference than this value is entered, the drive will run at the limit set to d2-02. If the drive is started with a lower
reference than d2-02, it will accelerate up to d2-02.
No. Parameter Name Setting Range Default
d2-02 Frequency Reference Lower Limit 0.0 to 110.0% 0.0%
Internal frequency
reference
d2-01
Operating
range
Frequency Reference Upper Limit
Set frequency reference
Frequency Reference Lower Limit
d2-02
Figure 4.21 Frequency Reference: Upper and Lower Limits
4.7 Basic Drive Setup Adjustments
YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual 127
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Start-Up Programming & Operation