Rockwell Automation 1760-DNET Pico DeviceNet Communications Module User Manual - Manual (Page 159)

Publication 1760-UM003A-EN-P - September 2005
Glossary 7
Master/Slave Mode
Operating mode in which a station or node of the system acts as
master that controls communication on the bus.
Mode
Operating mode.
Module bus
Represents the internal bus of an XI/ON station. Used by the XI/ON
modules for communication with the gateway. Independent of the
fieldbus.
MSB
Abbreviation for “Most Significant Bit“. Bit with the most significant
value.
Multimaster Mode
Operating mode in which all stations or nodes of a system have equal
rights for communicating on the bus.
NAMUR
Abbreviation for "Normen-Arbeitsgemeinschaft für Mess- und
Regeltechnik". NAMUR proximity switches represent a special
category of 2-wire proximity switches. They are highly resistant to
interference and reliable due to their special construction, e.g. low
internal resistance, few components and short design.
Offline Connection Set
The Offline Connection Set allows communication with a device that
is in communication error state but not in bus-off state due to an
ambiguous address. It is usually no longer possible to address this
device on the network, and it must be initialised manually by
switching it off and on. The Offline Connection Set can be used in this
situation to address such a device on the network.
Overhead
System management time. Required once for each data transfer cycle.
Parameter assignment
Definition of parameters for individual bus stations or their modules in
the configuration software of the DeviceNet master.