INTRODUCTION
GLOSSARY OF TERMS AND ABBREVIATIONS
1 - 8
GLOSSARY OF TERMS AND ABBREVIATIONS
Table
contains those terms and abbreviations that are unique to
ABB or have a definition that is different from standard industry
usage.
REFERENCE DOCUMENTS
Table 1-1. Glossary of Terms and Abbreviations
Term
Description
Cascade Station
An analog control station configuration that allows an externally generated signal, such
as the output of an upstream controller, to control the set point. One of three station
types available in the normal operating mode.
Fatal Error
An error that causes the device to go into a fail mode and send its output to a defined
value.
Function Block
The occurrence of a function code at a block address of a module.
Function Code
An algorithm which manipulates specific functions. These functions are linked together
to form the control strategy.
Loop
That portion of an analog process control loop which resides within the controller and
typically consists of an analog input measuring the process variable, a manual/auto
station generating a set point, a PID control algorithm and an analog output driving a
final control element.
Module Bus
Peer-to-peer communication link used to transfer information between intelligent
modules within a process control unit.
Ratio Station
An analog control station configuration that maintains a ratio between two variables. The
ratio of an externally generated wild variable times the controlled variable becomes the
set point that provides regulation of a third variable. One of three station types available
in the normal operating mode.
Termination Unit
Provides input/output connection between plant equipment and INFI 90 Open/
Network 90 modules.
Wild Variable
A variable that is used as a reference for a control loop.
Table 1-2. Reference Documents
Document No.
Title
I-E92-500-5
CLB01 Loop Bypass Station
I-E92-500-7
Type CLC Loop Command Controller
I-E92-501-2
CTT Configuration and Tuning Terminal
I-E92-504-1
CBE01 Module Bus Extender
I-E92-504-2
CIC01 Computer Interface Command
I-E96-200
Function Code Application Manual
I-E96-200-1
Function Code Quick Reference Guide
I-E96-500
Site Planning and Preparation
I-E96-717
Computer-Aided Drawing/Text (CAD/TXT)
(Release 5.2.2
1
)
I-E97-811-1
LAN-90 Process Control View (PCV) (Release 4.3)
P-E21-001
Installing a 4-20 mA Transmitter in a Hazardous
Location