National Instruments 370578B-01 Benutzerhandbuch
Glossary
G-6
ni.com
R
Repeater
Boost the signals to and from the further link.
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.
the device and general characteristics of a device, such as
manufacturer and device name. Only one resource block per device is
allowed.
Roundcard
A hardware interface for developing Foundation Fieldbus-compliant
devices.
devices.
S
s
Seconds.
Segment
.
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.
across the Fieldbus using a standard set of message formats.
Session
A communication path between an application and the NI-FBUS
Communications Manager.
Communications Manager.
Signal
An extension of the IEEE 488.2 standard that defines a standard
programming command set and syntax for device-specific
operations.
programming command set and syntax for device-specific
operations.
Stack
A set of hardware registers or a reserved amount of memory used for
calculations or to keep track of internal operations.
calculations or to keep track of internal operations.
T
Tag
A name you can define for a block, virtual field device, or device.
Terminator
A device used to absorb the signal at the end of a wire.
Trend
A Fieldbus object that allows a device to sample a process variable
periodically, then transmit a history of the values on the network.
periodically, then transmit a history of the values on the network.