Rockwell Automation 1788-EN2PAR EtherNet/IP and ControlNet to PROFIBUS PA Linking Device User Manual - Manual (Page 69)

Rockwell Automation Publication 1788-UM058B-EN-P - September 2014 69
Glossary
ring bus A network where signals are transmitted from one station and replayed through
each subsequent station in the network. Signal can travel in either direction of the
ring so it creates network redundancy; if the ring breaks in one place the nodes
can still communicate.
Studio 5000 Logix Designer Software that provides a programming environment for sequential, process, drive,
and motion control programming. The Studio 5000 Logix Designer application
provides an IEC 61131-3 compliant interface for controls programming.
signal The event or electrical quantity that conveys information from one point to
another.
terminator Impedance-matching module used at or near each end of a transmission line that
has the same characteristic impedance of the line. Terminators are used to
minimize signal distortion, which can cause data errors. PA terminators convert
the current signal transmitted by one device to a voltage signal that can be
received by all devices on the network.
topology The shape and design of the PROFIBUS PA network.
trunk The main communication highway between devices on a PROFIBUS PA
network. The trunk acts as a source of main supply to spurs on the network.