5.2 b: Application
180 YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
b8-03: Energy Saving Control Filter Time Constant (OLV, CLV)
Parameter b8-03 sets the response time for Energy Saving. Although lowering this value allows for a quicker response,
instability may result if it is too low.
b8-04: Energy Saving Coefficient Value (V/f, V/f w/PG)
Parameter b8-04 is used to fine-tune Energy Saving control. The default setting depends on the capacity of the drive.
This default setting is for a standard YASKAWA motor. If using a motor other than a standard one, adjust the default
setting of b8-04 in increments of around 5% until the 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 ener
gy consumption, but too small a value will cause the motor to
stall.
Note: This 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 120).
b8-05: Power Detection Filter Time (V/f, V/f w/PG)
The Energy Saving function continuously searches out the lowest output voltage in order to achieve minimum output
power. Parameter b8-05 determines how often the output power is measured in ms.
Reducing this setting will increase the response time. If the filter time is too short, the motor
may become unstable with a
lighter load.
b8-06: Search Operation Voltage Limit (V/f, V/f w/PG)
Sets the voltage limit for the optimal output voltage detection of Speed Search as a percentage of the maximum output
voltage. During the search operation, the drive will keep the output voltage above this level to prevent motor stalling.
Note: If set too low, the motor may stall with a sudden increase to the load. Disabled when b8-06 = 0. Setting this value to 0 does not
disable Energy Saving.
b8-16: Energy Saving Parameter (Ki) for PM Motors
Coefficient to adjust torque linearity.
This parameter rarely needs to be changed.
When E5-01 (Motor Code Selection (for PM Motors)) is set to 1 or 2, the automatically calculated value
will be set. This set value cannot be changed. If oscillation occurs when Energy Saving is enabled (b8-01 = 1), then check
the value displayed in monitor U5-21. If the value displayed differs from the Ki value written on the motor nameplate,
then set b8-16 accordingly.
No. Name Setting Range Default
b8-03 Energy Saving Control Filter Time Constant 0.00 to 10.00 s
Determined by
A1-02, C6-01, and o2-04
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
No. Name Setting Range Default
b8-05 Power Detection Filter Time 0 to 2000 ms 20 ms
No. Name Setting Range Default
b8-06 Search Operation Voltage Limit 0 to 100% 0%
No. Name Setting Range Default
b8-16
<1> The setting range of the drives is 0.00 to 2.00 for software versions S1018 and earlier.
<2> The setting range is 0.00 to 2.00 for models CIMR-A4A0930 to 4A1200.
Energy Saving Parameter (Ki) for PM Motors 0.00 to 3.00 <1> <2> 1.00
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