Specifications

Glossary
Glossary - 2
alarm priority
One of four levels of severity specified for the alarm. The alarm priorities from least to
most severe are:
•Journal
•Low
•High
•Urgent
algorithm
See point algorithm.
analog point
A point type that is used to represent continuous values that are either real or integer.
Continuous values in a process could be: pressure, flow, fill levels, or temperature.
ANSI
American National Standards Institute
API
Application Programming Interface.
application program
A user-written program integrated into PlantScape using the Application Programming
Interface (API).
area
A logical sub-section of your plant or process. Custom displays, points, and access
configuration may be partitioned by area. Operators or Stations can be assigned access
to particular areas only.
automatic checkpointing
In a redundant server system, the automatic transfer of database updates from the
primary server to the backup server.
auxiliary parameter
An analog point parameter in addition to PV, SP, OP, and MD. Up to four auxiliary
parameters can be used to read and write four related values without having to build
extra points.
bad value
A parameter value, (for example, PV), that is indeterminate, and is the result of
conditions such as unavailable input.
plscpcg.book Page 2 Monday, May 28, 2001 10:11 AM