Bailey Infi 90 IMRIO02, Instruction

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INTRODUCTION
GLOSSARY OF TERMS AND ABBREVIATIONS
I-E96-317A 1 - 5
GLOSSARY OF TERMS AND ABBREVIATIONS
Term Definition
Buffer A storage device used to compensate for a difference in rate of flow of information, or
time between events, when information is transmitted from one computer to another.
Controlway A redundant peer-to-peer communication path for point data transfer between
intelligent modules within a process control unit.
CPU Central Processing Unit; the hardware and circuitry necessary to interpret and
execute control commands.
ACS Analog Control Station (IISAC03).
Default Latch
A buffer that stores the default values required for fail-safe operation of the system.
Dipshunt A dual in-line package with shorting bars.
Dipswitch
Dual in-line package with single-pole switches.
Expander Bus Parallel bus between the master module and the slave, located on the backplane of
the MMU.
Latch A temporary storage buffer that latches onto a piece of data until instructed to move it
elsewhere.
Master Module One of a series of controller modules designed to direct field processes through
output modules. The MFP is a master module; in the remote I/O case, the remote
RIO is also a master module.
MFP Multi-Function Processor module (IMMFP01/02/03).
MMU Module Mounting Unit (IEMMU01/02); provides electrical and communication
support to the modules.
Node Device(s) on the INFI 90/Network 90 Plant Loop, Superloop or INFI-NET (maximum
of 63 on Plant Loop, 250 on Superloop/INFI-NET). A node can be a Operator
Interface Station (OIS), a Process Control Unit (PCU) or Network Interface Unit (NIU)
in any combination.
PCU Process Control Unit; rack type industrial cabinet that contains master, slave and
communication modules, and their communication paths.
Plant Loop Network 90 data communication highway with 63 node capacity.
Infi-Net
Advanced data communication highway with 250 node capacity.
Register The computer hardware for storing one machine word.
RIO
Remote I/O Module (IMRIO02).
RMP Remote Master Processor; RIO Module that is a master on the RIO serial
communication link (slave to MFP).
RSP Remote Slave Processor; RIO Module that is a slave on the RIO serial
communication link (master on Expander Bus).
TMU Termination Mounting Unit (NTMU01); provides support to the termination modules.