Yaskawa Sigma Mini - Manual (Page 72)

APPLICATIONS
2.2.6 Contact Input Speed Control
— 2-28 —
Control Block Diagram
A control block diagram for a Servopack used for position control is shown here.
Differentiation
Smoothing
X1
X2
X4
Error
counter
Kp
Feed-
forward gain
First
order
lag filter
Bias
Speed
loop
Current
loop
M
Frequency
dividing
+
−
Cn-1D
Servomotor
PG
Reference
pulse
PG signal
output
Servopack for position control
Encoder
/COIN
signal
B
A
B
A
+
+ +
Cn-24 Cn-27
Cn-1C
Cn-25
Cn-1A
Cn-02
Cn-26 Cn-24
Cn-25
Cn-0A
X4
2.2.6 Contact Input Speed Control
The contact input speed control function provides easy-to-use speed control. It allows the
user to initially set three different motor speeds in parameters, select one of the speeds exter-
nally by contact input and run the motor.
This function can be used for speed/torque control only.
Servopack
CN1-1
CN1-2
Cn-1F SPEED 1
Cn-20 SPEED 2
Cn-21 SPEED 3
Speed selection
Servomotor
M
Parameter
Contact
input
IN1
IN2
No external speed setting
device or pulse generator is
required.
The motor is operated at the
speed set in the parameter.
2