GE Industrial Solutions Control System Toolbox For Configuring the Trend Recorder - Manual (Page 41)

GEH-6408A Trend Recorder Glossary of Terms
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real time
Immediate response. It refers to process control and embedded systems, and fast
transaction processing systems that must respond instantly to changing conditions.
sample set
The set of values taken when signals are being trended together with the Trend
Recorder.
sampling rate
The period that values are collected to put in a sample set.
service
Functionality derived from a particular software program. For example, the Data
Historian service transmits and provides conversion of data in the SDB.
signal
The basic unit for variable information. Signals are the place holders for memory
locations in the toolbox’s different platforms.
Status_S
GE proprietary communications protocol that provides a way of commanding and
presenting the necessary control, configuration, and feedback data for a device. The
protocol over DLAN+ is Status_S. It can send directed, group, or broadcast.
task
Part of a Module that contains Blocks and Macros. Its scheduling is a function of its
Modules base scheduling rate.
toolbox
A Windows-based software package used to configure controllers and OC2000 and
drive devices.
trend
A time-based plot to show the history of values.
Trend Recorder
A subsystem of the toolbox that monitors and graphs signal values from a controller
or drive device.