Rockwell Automation 1785-Lxxx Enhanced and Ethernet PLC-5 Programmable Controllers - Manual (Page 16)

Publication 1785-UM012D-EN-P - July 2005
Preface 2
Terms Used in This Manual Become familiar with the following terms and definitions which are used
throughout this manual.
Term Definition
Block-transfer data data transferred, in blocks of data up to 64 words, to/from a block-
transfer I/O module (for example, an analog module)
Discrete-transfer data data (words) transferred to/from a discrete I/O module
Enhanced PLC-5 controllers references PLC-5/11, -5/20, -5/26, -5/30, -5/40, -5/46, -5/40L,
-5/46L, -5/60, -5/60L, -5/80, and -5/86 controllers
PLC-5/26, -5/46, and -5/86 controllers are protected
controllers. See the PLC-5 Protected Controllers Supplement,
publication 1785-6.5.13
This term also refers to the PLC-5/V30B, -5/V40B, -5/V40L, and
-5/V80B controllers when applicable. See the PLC-5/VME VMEbus
Programmable Controllers User Manual, publication 1785-6.5.9,
for more information
Ethernet a local area network with a baseband communication rate of 10M
bps designed for the high-speed exchange of information between
computers and related devices
Ethernet PLC-5 controllers references PLC-5/20E, -5/40E, and -5/80E controllers
Extended-local I/O I/O connected to a controller across a parallel link to achieve
higher throughput, thus limiting its distance from the controller
Extended local I/O link a parallel link for carrying I/O data between a PLC-5/40L or -5/60L
controller and extended-local I/O adapters
PLC-5 controller used to generically reference Enhanced PLC-5 and Ethernet PLC-5
controllers in this manual only
Controller-resident local I/O
chassis the I/O chassis in which the PLC-5 controller is installed
Remote I/O link a serial communication link between a PLC-5 controller port in
scanner mode and an adapter as well as I/O modules that are
located remotely from the PLC-5 controller
Remote I/O chassis the hardware enclosure that contains an adapter and I/O modules
that are located remotely on a serial communication link to a PLC-5
controller in scanner mode