S: Special Applications; S1: Dynamic Noise Control - YASKAWA HV600 Technical Reference

5.11

S: Special Applications

S parameters set these functions:
• Dynamic Noise Control
• Sequence Run Timers
• PI2 Control
• HAND/OFF/AUTO Mode Operation
• Emergency Override Function
◆

S1: Dynamic Noise Control

The Dynamic Audible Noise Control Function suppresses the output voltage to decrease audible noise.
This function can help you quickly restore output voltage after an impact caused a sudden increase in the time
constant. Dynamic Audible Noise Control is useful in applications where load impact is common. You cannot use b8-
01 = 1 [Energy Saving Control Selection = Enabled] and S1-01 = 1 [Dynamic Noise Control = Enabled] at the same
time.
■
Set Parameters for Dynamic Noise Control
1.
Set S1-01 = 1 [Dynamic Noise Control = Enabled] to enable Dynamic Noise Control.
Note:
• When S1-01 = 1, the tolerance to an impact load will decrease compared to V/f Control without Energy Saving.
• You must disable Dynamic Noise Control for applications without an impact load.
The current level increases from the added load and improves the drive responsiveness.
2.
Increase S1-02 [Voltage Reduction Rate] to make the flux stronger and increase the torque.
Note:
The Dynamic Noise Control function will decrease the load movement to a minimum level.
3.
Decrease S1-03 [Voltage Restoration Level] and S1-04 [Voltage Restoration Off Level] to recover the voltage
more quickly during the impact load conditions.
Note:
Under certain conditions, voltage stability may be unsatisfactory.
4.
Decrease S1-05 [Volt Restore Sensitivity Time K] to decrease the voltage level and increase the voltage
restoration speed when the load increase.
5.
Decrease S1-06 [Volt Restore Impact Load Time K] to increase drive response to an impact load.
When the output voltage is unstable, increase these values to decrease the load response:
• Difference between S1-03 and S1-04
• S1-05
• S1-06
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S1-01: Dynamic Noise Control
No.
Name
(Hex.)
S1-01 Dynamic Noise Control
(3200)
0 : Disabled
1 : Enabled
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Sets the function that decreases the output voltage in variable torque applications to decrease audible
noise.

5.11 S: Special Applications

Description
5
Default
(Range)
1
(0, 1)
375