Yaskawa Sigma II Series Servo System - Manual (Page 79)

Sigma II User’s Manual Chapter 4: Trial Operation
4 - 7
b. Turn ON the servo ON signal.
Set /S-ON (CN1-40) to 0V. If normal, the servomotor will turn ON and the LED
indicator on the front panel will display as shown above. If an alarm display
appears, take appropriate action as described in 9.2 Troubleshooting.
Note: If there is noise in the reference voltage for speed control, the “-” on the left of the 7-segment LED may flash.
Operating Using Reference Input
The operating procedure here depends on the parameter settings (control mode selection at
memory switch Pn000.1). Use the following procedure for operations with speed and
position control.
Operating Procedure in Speed Control Mode: Set Pn000.1 to 0
Standard speed control setting is described here.
1. Gradually increase the reference speed input (V-REF, CN1-5) voltage. The servomotor
will rotate.
2. Check the following items in Monitor Mode. See 7.1.7 Operation in Monitor Mode.
• Has the reference speed been input?
• Is the motor speed as designed?
• Does the reference speed coincide with the actual motor speed?
• Does the servomotor stop when the speed reference is 0?
3. If the servomotor rotates at extremely slow speed with 0V specified for the reference
voltage, correct the reference offset value as described in 7.2.3 Automatic Adjustment of
the Speed and Torque Reference Offset or 7.2.4 Manual Adjustment of the Speed and
Torque Reference Offset.
Un000 Actual motor speed
Un001 Reference speed
Display with the servo ON.
(CN1-5)
(CN1-6)
V-REF
Servomotor rotates at a speed proportiona
to the reference voltage.
SG
Servopack
Servomotor