Yaskawa Large Capacity Sigma II Series - Manual (Page 18)

1 For First-time Users of AC Servos
1.1.2 Technical Terms
1-4
1.1.2 Technical Terms
The main technical terms used in this manual are as follows:
• Servo mechanism
• Servo
Normally, servo is synonymous with servo mechanism. However, because “mecha-
nism” is omitted, the meaning becomes somewhat ambiguous. Servo may refer to the
entire servo mechanism but may also refer to an integral part of a servo mechanism such
as a servomotor or a servo amplifier. This manual also follows this convention in the use
of the term “servo.”
• Servo control system
Servo control system is almost synonymous with servo mechanism but places the focus
on system control. In this manual, the term “servo system” is also used as a synonym of
servo control system.
Related Terms Meaning
Servomotor General servomotors or Yaskawa SGMBH servomotors. In some cases,
a position detector (encoder) is included in a servomotor.
SERVOPACK Trademark of Yaskawa servo amplifier “SGDH SERVOPACK.”
Servo drive A servomotor and amplifier pair. Also called “servo.”
Servo system A closed control system consisting of a host controller, servo drive and
controlled system to form a servo mechanism.
Host controller
Reference
Amplifier
(SERVOPACK) Servomotor
Operate Controlled
system
Servo system
Servo drive
+2 - +1 L1/R L2/S L3/T U V W
480 V 460 V DU 400 V 0 V 440 V DW DV B1 380 V DC 24N B2 DC 24P CHARGE
S - H D G
T DATA/ SE E MOD /
K SERVOPAC
A YASKAW
R
O P E R A T O CN3
8 CN POWER
CN5
WARNING 5
! electric shock. Disconnect all power May cause
before servicing. and wait 5 min.
grounding techniques. Use proper