YASKAWA G7 Series User Manual

6-38
 Stabilizing Speed (Speed Feedback Detection Function)
The speed feedback detection control (AFR) function measures the stability of the speed when a load is sud-
denly applied, by calculating the amount of fluctuation of the torque current feedback value, and compensat-
ing the output frequency with the amount of fluctuation.
Related Parameters
Parameter
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Operation
Control Methods
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vector
Open
Loop
Vector
2
n2-01
Speed
Feedback
Detection
Control (AFR)
Gain
Sets the internal speed feedback
detection control gain in the
automatic frequency regulator
(AFR).
Normally, there is no need to
change this setting. Adjust this
parameter as follows:
- If hunting occurs, increase the
set value.
- If response is low, decrease
the set value.
Adjust the setting by 0.05 units
at a time, while checking the
response.
0.00
to
10.00
1.00 No No No A No No
AFR Gain
n2-02
Speed
Feedback
Detection
Control (AFR)
Time Constant
Sets the time constant to control
the rate of change in the speed
feedback detection control.
0
to
2000
50ms No No No A No No
AFR Time
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YASKAWA G7 Series Specifications

General

Series	G7
Frequency	50/60 Hz
Output Voltage	Matches Input Voltage
Control Method	V/f Control
Overload Capacity	150% for 60 seconds
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheating, Short Circuit
Communication	RS-485, Modbus, DeviceNet, Profibus, Ethernet
Safety	Safe Torque Off (STO)
Operating Temperature	-10°C to 50°C
Humidity	5% to 95% (non-condensing)
Cooling Method	Fan Cooled
Enclosure Rating	IP20
Storage Temperature	-20°C to 65°C