
F
Feed-in cable
Hybrid connection cable between the Decentral Access Module (DAM 510)
and ISD 511 servo drive.
Feedback system
The feedback system measures the rotor position.
Fieldbus
Communication bus between controller and servo axis and system mod-
ules; in general between controller and field nodes.
Firmware
Software in the unit; runs on the control board.
Function block
Device functionalities are accessible via the engineering environment soft-
ware.
I
IGBT
The insulated-gate bipolar transistor is a 3-terminal semiconductor device,
primarily used as an electronic switch to combine high efficiency and fast
switching.
IRT
Isochronous Real-Time.
ISD
Integrated Servo Drive
Installation elevation
Installation elevation above normal sea level, typically associated with a de-
rating factor.
L
LCP
Local control panel.
Loop cable
Hybrid connection cable between 2 decentral servo drives, with 2 M23 con-
nectors.
M
M23 connectors
Connectors (X1 & X2) for connecting the hybrid feed-in and loop cables on
the B side of the ISD 511 servo drive.
Motor shaft
Rotating shaft on the A side of the servo motor, typically without a key
groove.
Multi-turn encoder
Describes an absolute encoder, in which the absolute position remains
known after several revolutions.
P
PELV
Protected extra low voltage is an electricity supply voltage in a range which
carries a low risk of dangerous electrical shock.
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.
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154 | Danfoss A/S © 2023.08
Glossary
VLT® Servo Drive System ISD 511
Operating Guide
Содержание VLT ISD 511
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