Siemens 6SR41 series Product User Manual page 188

Glossary
CMP
Refer to the glossary term SOP.
Comparator
A comparator is a device that compares two quantities and determines their equality. The
comparator submenus allow the programmer to specify two variables to be compared. The
results of the custom comparison operations can be used in the system program.
Configuration Update
see Tool Suite definition.
Converter
The converter is the component of the drive that changes AC voltage to DC voltage.
Critical speed avoidance
Critical speed avoidance is a feature that allows the operator to program up to 3 mechanical
system frequencies that the drive will "skip over" during its operation.
CSMC
An acronym for Closed Loop Synchronous Machine (SM) Control. One of six control modes
of the NXG drive. This is a flux vector control for a synchronous machine, utilizing an
encoder for speed feedback and providing a field excitation command for use by an external
field exciter.
DC link
The DC link is a large capacitor bank between the converter and inverter section of the drive.
The DC link, along with the converter, establishes the voltage source for the inverter.
De Morgan's Theorem
The duality principal of Boolean algebra used to convert system logic equations into sum-of-
products notation.
Debug Tool
see Tool Suite definition.
Downloading
Downloading is a process by which information is transmitted from a remote device (such as
a PC) to the drive. The term "downloading" implies the transmission of an entire file of
information (e.g., the system program) rather than continued interactive communications
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Operating Instructions, Version AE 12/2009, A5E01454341C
Product User Manual