Glossary - Siemens SINAMICS PERFECT HARMONY GH180 Function Manual

Glossary

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 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).
Catch a spinning load
"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 control menu system.
CLVC
An acronym for Closed Loop Vector Control, one of the control modes in the drive. This is flux
vector control for an induction machine (IM), utilizing an encoder for speed feedback.
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