Application parameter group 10
PARAMETER DESCRIPTION 250
5.11.2 Zero-speed/zero-servo control
Zero-speed/ zero-servo function selection
Parameter
Name
Default Setting Range
Content
10-03
P.151
Zero-speed control
function selection
0
0
Off. performed
1
Perform zero speed control at zero speed
2
In close-loop vector mode do zero-servo.
10-04
P.152
Voltage at zero-speed
control
4.0%
0～30.0%
7.5K/11KF and below
2.0%
From 11K/15KF to 55K/75KF
1.0%
75K/90KF and above
Zero-speed control
Make sure to set 01-11(P.13) (start frequency) to zero when using this function.
Note: 1. If set 10-04(P.152) to 6%, output voltage of zero speed is 6% of 01-04(P.19) (base frequency voltage).
Zero servo
Zero servo is closed loop position control, that can keep the motor stop at any position (origin) and lock the motor
at a certain position while external force is applied.
When zero servo is on, once the motor speed falls below 10-00(P.10)
value, inverter starts zero servo mode and
holds the current position. When zero servo command is released and run command is given, the motor run again.
Zero servo sequence diagram:
Run command
ON
Zero Servo
Operation
Zero servo
command
Motor speed
ON
OFF
OFF
P.10
（DC Injection Braking
start frequency）
Note: Avoid using zero servo to lock 100% load for long period of time, this can cause failure. If need to lock motor for
long periods, make sure the current is less than 50% of inverter rated current during zero servo, or use a larger
capacity inverter.
Setting
Setting
