YASKAWA CIMR-ACA4011 Instruction Manual page 285

Monitor Function
Parameter
Number
U1-35
Time Chart
A time chart for the zero-servo function is given in Time Chart for Zero-Servo.
Application Precautions
Be sure to leave the Run Command input on. If the Run Command is turned off, the output will be inter-
•
rupted and the zero-servo function will be disabled.
The holding force of the zero-servo is adjusted in b9-01. The holding force will increase if the value of the
•
setting is increased, but oscillation and hunting will occur if the setting is too large. Adjust b9-01 after
adjusting the speed control gain.
The zero-servo detection width is set as the allowable position offset from the zero-servo start position. Set
•
4 times the number of pulses from the PG.
The Zero-servo End signal will go off when the Zero-Servo Command is turned off.
•
IMPORTANT
-124
6
Name
Description
Display
Zero-Servo move-
Shows the number of PG pulses times
ment pulses
4 for the movement range when
stopped at zero.
Zero Servo Pulse
Run Command
Zero servo command
Frequency (speed) reference
Excitation level
b2-01
Motor speed
Zero Servo End signal
Fig 6.79 Time Chart for Zero-Servo
Do not lock the servo for extended periods of time at 100% when using the zero-servo function. MxC errors
may result. Extended periods of servo lock can be achieved by ensuring that the current during the servolock
is 70% or less or by increasing the MxC output capacity.
Output Signal Level
During Multi-Function
Analog Output
No output available
on off
on
Zero-servo status
Control Methods
Min.
Open
Flux
Unit
V/f Loop
Vector
Vector
1 No No A
off