n
b8-03: Energy Saving Control Filter Time Constant (OLV, CLV)
Sets the response time for Energy Saving. A lower value allows for a quicker response; however a value that is too low may
cause instability.
No.
Name
Setting Range
Default
b8-03
Energy Saving Control Filter Time Constant
0.00 to 10.00 s
Determined by
A1-02 and o2-04
n
b8-04: Energy Saving Coefficient Value (V/f, V/f w/PG)
Fine tunes Energy Saving control.
The default setting is for a standard Yaskawa motor. When using a different motor, adjust this parameter in 5% increments
until output power monitor U1-08 is at the minimum value, while running the drive with a light load.
A low setting results in less output voltage and less energy consumption. If the value is set too low the motor may stall. The
default setting depends on the capacity of the drive.
No.
Name
Setting Range
Default
b8-04
Energy Saving Coefficient Value
0.00 to 655.00
Determined by
C6-01, E2-11, and
o2-04
Note:
The default value changes if the motor rated capacity set to E2-11 is changed. The Energy Saving coefficient is set automatically when
Auto-Tuning for Energy Saving is performed (
Refer to Auto-Tuning on page 157
).
n
b8-05: Power Detection Filter Time (V/f, V/f w/PG)
Determines how often in milliseconds the output power is measured. The Energy Saving function continuously searches out
the lowest output voltage to achieve minimum output power.
Reducing this setting increases the response time. If the filter time is too short, the motor may become unstable with a lighter
load.
No.
Name
Setting Range
Default
b8-05
Power Detection Filter Time
0 to 2000 ms
20 ms
n
b8-06: Search Operation Voltage Limit (V/f, V/f w/PG)
Sets the voltage limit for the Speed Search optimal output voltage detection as a percentage of the maximum output voltage.
The drive will keep the output voltage above this level during the search operation to prevent motor stalling.
Note:
If set too low, the motor may stall when the load is suddenly increased. Disabled when set to 0. Setting this value to 0 does not disable
Energy Saving.
No.
Name
Setting Range
Default
b8-06
Search Operation Voltage Limit
0 to 100%
0%
n
b8-16: Energy Saving Parameter (Ki) for PM Motors
There is normally no need to change this parameter from the default value. Coefficient to adjust torque linearity.
Set to the Ki value specified on the motor nameplate.
Setting E5-01, Motor Code Selection (for PM Motors), to 1
ooo
or 2
ooo
automatically sets the calculated value. This set
value cannot be changed. If oscillation occurs when Energy Saving is enabled (b8-01 = 1), check the value displayed in monitor
U5-21. If the value displayed differs from the Ki value written on the motor nameplate, set b8-16 accordingly.
No.
Name
Setting Range
Default
b8-16
Energy Saving Parameter (Ki) for PM Motors
0.00 to 3.00
1.00
n
b8-17: Energy Saving Parameter (Kt) for PM Motors
There is normally no need to change this parameter from the default value. Coefficient to adjust torque linearity.
Set to the Kt value specified on the motor nameplate.
Setting E5-01, Motor Code Selection (for PM Motors), to 1
ooo
or 2
ooo
automatically sets the calculated value. This set
value cannot be changed. If oscillation occurs when Energy Saving is enabled (b8-01 = 1), check the value displayed in monitor
U5-22. If the value displayed differs from the Kt value written on the motor nameplate, set b8-17 accordingly.
5.2 b: Application
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
219
5
Parameter Details
Summary of Contents for U1000 iQpump Drive
Page 705: ......
