INTRODUCTION
GLOSSARY OF TERMS AND ABBREVIATIONS
I-E96-211A
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GLOSSARY OF TERMS AND ABBREVIATIONS
Term
Definition
Analog
A signal with an infinite number of values as opposed to a digital value that is either 0
or 1.
Checksum
The sum of the bytes in a command except the checksum byte and the command
terminator. Software security checks use this sum.
Configuration
Defining module operations (control strategy) with function blocks.
Digital
A value that is either 0 or 1.
Executive Block
Fixed function block that determines module operating characteristics.
Function Block
An area in the MFC's user defined memory containing a function code.
Function Code
Defines operation(s) to be done (AND, OR, PID).
MCS
Management Command System - a CRT-based operator monitor and control
console; also used in configuration.
MFT
Machine Fault Timer - reset by the processor during normal operation. If there is an
error, the MFT times out and the module stops.
Module Bus
Serial communication link between Multi-Function Controller and other control
modules (e.g., Logic Master Module, Controller, etc.).
OIS
Operator Interface Station - a CRT-based operator monitor and control console; also
used in configuration.
PCU
Process Control Unit - rack type industrial type cabinet containing control and slave
modules.
Primary
The active module in a redundant configuration.
Secondary
The backup module in a redundant configuration.
Slave Expander
Bus
Communication link between Multi-Function Controller and slave modules.
TM
Termination module - high density terminator for process wiring.
TU
Termination unit - terminator for process wiring.
