6.5 Speed Control
6.5.1 Basic Settings for Speed Control
6-16
6.5
Speed Control
There are two types of speed control: speed control with an analog voltage reference and
speed control with internal set speeds. This section describes speed control with an analog
voltage reference.
You input a speed reference into the SERVOPACK with an analog voltage to operate the Servo-
motor at the reference speed. Refer to the following section for information on speed control
with internal set speeds.
6.9 Internal Set Speed Control
•
If you create a position loop in the host controller, you use the SERVOPACK for speed con-
trol.
•
If you need to control only the speed of the Servomotor, you use the SERVOPACK for speed
control.
You set the control method in Pn000 = n.
X
(Control Method Selection).
Set Pn000 to n.
0
to set the control method to speed control.
6.5.1
Basic Settings for Speed Control
This section describes the use of the V-REF (Speed Reference Input) signal, speed reference
input gain, and speed reference offset adjustment in speed control with analog voltages.
V-REF (Speed Reference Input) Signal
Input the V-REF (Speed Reference Input) signal to the SERVOPACK to operate the Servomotor
at a speed that is proportional to the input voltage.
Maximum input voltage:
±
12 VDC
•
Rotary Servomotors
•
Linear Servomotors
Parameter
Meaning
When Enabled
Classification
Pn000
n.
0
(default setting)
Speed control with analog references
After restart
Setup
Type
Signal
Connector Pin No.
Meaning
Input
V-REF
CN1-5
Speed reference input signal
SG
CN1-6
Signal ground for speed reference input signal
Speed Reference Input Example
If Pn300 is set to 600 (default setting), the motor would operate at the rated speed for 6.00 V.
Example
Speed Reference
Input
Rotation
Direction
Speed
For SGM7A Servomotor
+6 V
Forward
Rated motor speed
3000 min
-1
-3 V
Reverse
1/2 of rated motor speed
-1500 min
-1
+1 V
Forward
1/6 of rated motor speed
500 min
-1
Speed Reference
Input
Movement
Direction
Speed
For SGLGW-30A Servomotor
+6 V
Forward
Rated motor speed
1500 mm/s
-3 V
Reverse
1/2 of rated motor speed
-750 mm/s
+1 V
Forward
1/6 of rated motor speed
250 mm/s