PLC
A programmable logic controller is a digital computer used for automation
of electromechanical processes, such as control of machinery on factor as-
sembly lines.
PLCopen
®
The name PLCopen
®
is a registered trademark and, together with the
PLCopen
®
logos, is owned by the association PLCopen
®
. PLCopen
®
is a ven-
dor- and product-independent worldwide association, that defines a stand-
ard for industrial control programming.
POU
Program organization unit. This can be a program, function block, or func-
tion.
PSM
Power Supply Module.
PWM
Pulse width modulation.
R
RCCB
Residual current circuit breaker.
RT
Real-time.
Radial force
The force in newton acting at 90° to the longitudinal direction of the rotor
axis.
Resolver
A feedback device for servomotors, typically with 2 analog tracks (sine and
cosine).
S
SIL 2
Safety Integrated Level II.
SSI
Synchronous serial interface.
STO
Safe Torque Off function. On activation of STO, the ISD 510 servo drive is no
longer able to produce torque in the motor.
Safety (STO)
A servo drive safety circuit that switches off the voltages of the driver com-
ponents for the IGBTs.
Scope
Scope is part of the DDS Toolbox software and is used for diagnosis. It ena-
bles internal signals to be depicted.
Single-turn encoder
Describes an absolute encoder, in which the absolute position for 1 revolu-
tion remains known.
Standstill (servo drive)
Power is on, there is no error in the axis, and there are no motion com-
mands active on the axis.
System modules
This term includes the Power Supply Module (PSM 510), the Decentral Ac-
cess Module (DAM 510), and the optional Auxiliary Capacitors Module
(ACM 510).
T
TwinCAT
®
TwinCAT
®
is a registered trademark of and licensed by Beckhoff Automation
GmbH, Germany. It is the integrated software development environment
for controllers from Beckhoff.
U
UAUX
Auxiliary supply, provides power to the control electronics of the ISD 510/
DSD 510 servo drives and the Power Supply Module (PSM 510), Decentral
Access Module (DAM 510), and Auxiliary Capacitors Module (ACM 510).
V
VLT
®
Servo Toolbox
A Danfoss pc software tool used for parameter setting and diagnostics of
VLT
®
Servo Drive systems
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Danfoss A/S © 2020.08
Glossary
VLT® Servo Drive System ISD 510/DSD 510
Operating Guide
