1.1 Speed Control
1.1.1 Basic Settings for Speed Control
1-2
1.1
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.
This manual provides the following supplemental information in addition to the information pro-
vided in the
Σ
-7-Series AC Servo Drive
Σ
-7S SERVOPACK with Analog Voltage/Pulse Train Ref-
erences Product Manual: /SPD-D (Motor Direction Input) Signal
the /SPD-D (Motor Direction Input) Signal and V-REF (Speed Reference Input) Signal
1.1.2 Operation Examples for Changing the Motor Direction
You input a speed reference into the SERVOPACK with an analog voltage to operate the Servo-
motor at the reference speed.
•
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.
1.1.1
Basic Settings for Speed Control
This section describes the use of the V-REF (Speed Reference Input) Signal, /SPD-D (Motor
Direction 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
If you will use a host controller, such as a programmable controller, for position control, connect
the above output pins to the speed reference output terminals on the host controller.
Note: Always use twisted-pair cables to control noise.
/SPD-D (Motor Direction Input) Signal
You can turn the /SPD-D signal ON and OFF to change the direction of the Servomotor.
Note: For information on allocating signals, refer to the product manual for your SERVOPACK.
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
Classification
Signal
Connector Pin No.
Description
Input
/SPD-D
Must be allocated.
Changes the Servomotor direction.
S
G
CN1
6
V-REF
5
D/A
0 V
Ho
s
t controller
Approx. 14 k
S
ERVOPACK
Summary of Contents for SERVOPACK Sigma 7S Series
Page 1: ......
