National Instruments NI-FBUS - Manual (Page 145)

Glossary
© National Instruments Corporation G-9 NI-FBUS Configurator User Manual
Programmable Logic
Controller A device with multiple inputs and outputs that contains a program
you can alter.
PT Pass Token.
Publisher A device that has at least one function block with its output value
connected to the input of another device.
Publishing schedule Determines when data members are published over the Fieldbus.
PV Process Variable.
R
RA Ratio.
Resource block A special block containing parameters that describe the operation
of the device and general characteristics of a device, such as
manufacturer and device name. Only one resource block per device is
allowed.
S
s Seconds.
Sample type Specifies how trends are sampled on a device, whether by averaging
data or by instantaneous sampling.
Scheduled/cyclic
communications Communication that occurs at the same time during each control
cycle.
Segment See Link .
Sensor A device that responds to a physical stimulus (heat, light, sound,
pressure, motion, flow, and so on), and produces a corresponding
electrical signal.
Server Device that receives a message request.
Service Services allow user applications to send messages to each other
across the Fieldbus using a standard set of message formats.
Session A communication path between an application and the NI-FBUS
Communications Manager.
Stack A set of hardware registers or a reserved amount of memory used for
calculations or to keep track of internal operations.