INTRODUCTION
GLOSSARY OF TERMS AND ABBREVIATIONS
I-E96-207A
1 - 5
GLOSSARY OF TERMS AND ABBREVIATIONS
Term
Definition
Analog
A continuous time signal with an infinite number of values.
Configuration
A control strategy with function blocks.
Digital
A discrete signal having only two states: on or off.
Dipshunt
Dual in-line package with shorting bars.
Dipswitch
A dual in-line package that contains single pole switches.
EWS
Engineering Work Station; an integrated hardware and software personal
computer system for configuring and monitoring INFI 90 modules.
Function Code
An algorithm which defines specific functions. These functions are linked
together to form the control strategy.
LED
Light Emitting Diode; the module front panel indicator that shows status and
error messages.
LSB
Least Significant Bit; the bit of a binary number that carries the least numeri-
cal weight.
Master Module
One of a series of modules designed to direct field processes through a
slave module. The multi-function processor is an example.
MCS
Management Command System; integrated operator console with data
acquisition and reporting capabilities. It provides a window into the process
for control and monitoring.
MMU
Module Mounting Unit; a card cage that provides electrical and communica-
tion support for INFI 90 modules.
Module Bus
A peer-to-peer communication path for point data transfer between intelli-
gent modules within a process control unit.
MSB
Most Significant Bit; the bit of a binary number that carries the most numeri-
cal weight.
OIS
Operator Interface Station; integrated operator console with data acquisition
and reporting capabilities. It provides a window into the process for flexible
control and monitoring.
PCU
Process Control Unit; rack type industrial cabinet that contains master, slave
and communication modules and their communication paths.
