6.5 Speed Control
6.5.1 Basic Settings for Speed Control
6-17
6
Application Function
s
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, /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: You must allocate the /SPD-D signal to use it. Use Pn50C = n.
X (/SPD-D (Motor Direction) Signal Allo-
cation) to allocate the signal to a connector pin. Refer to the following section for details.
6.1.1 Input Signal Allocations
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
