Glossary - Siemens 6SR41 series Product User Manual

Glossary

"Catch a spinning load" feature
"Catch a spinning load" is a feature that can be used with high-inertia loads (e.g., fans), in
which the drive may attempt to turn on while the motor is already turning. This feature can be
enabled via the NXG menu system.
AND
AND is a logical Boolean function whose output is true if all of the inputs are true in SOP
notation, AND is represented as "∗" (e.g., C=A∗B), although sometimes it may be omitted
between operands with the AND operation being implied (e.g., C=AB).
ASCII
ASCII is an acronym for American Standard Code for Information Interchange, a set of 8-bit
computer codes used for the representation of text.
Baud rate
Baud rate is a measure of the switching speed of a line, representing the number of changes
of state of the line per second. The baud rate of the serial port of the Perfect Harmony is
selected through the Baud Rate parameter in the Communications Menu [9].
Bit
Bit is an acronym for BInary digiT. Typically, bits are used to indicate either a true (1) or false
(0) state within the drive's programming.
Boolean algebra
A form of mathematical rules developed by the mathematician George Boole used in the
design of digital and logic systems.
Carrier frequency
Carrier frequency is the set switching frequency of the power devices (IGBTs) in the power
section of each cell. The carrier frequency is measured in cycles per second (Hz).
CLVC
An acronym for Closed Loop Vector Control - which is one of six control modes in the NXG
drive. This is flux vector control for an induction machine (IM), utilizing an encoder for speed
feedback.
Product User Manual
Operating Instructions, Version AE 12/2009, A5E01454341C
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