Flowserve 3400IQ Digital Positioner - Manual (Page 7)

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Logix 3400IQ Digital Positioner FCD LGENIM3402-00 – 0/07
flowserve.com
RFI Radio Frequency Interference
ROM Read Only Memory
SM System Management
SMA System Management Agent
SMIB System Management Information Base
VCR Virtual Communication Reference
VDC Volts Direct Current
VFD Virtual Field Device
XMTR Transmitter
Definitions
Term Abbrev. Definition
Alarm
The detection of a block leaving a particular state and when it
returns back to that state.
Analog Output (function block) AO
One of the standard function blocks defined by the Fieldbus
Foundation.
Application
A software program that interacts with blocks, events and
objects. One application may interface with other applications
or contain more than one application.
Block
A logical software unit that makes up one named copy of a
block and the associated parameters its block type specifies.
It can be a resource block, transducer block or a function
block.
Configuration (of a system or
device)
A step-in system design: selecting functional units,
assigning their locations and identifiers, and defining their
interconnections.
Device
A physical entity capable of performing one or more specific
functions. Examples include transmitters, actuators, control-
lers, operator interfaces.
Device Description DD Description of FBAPs within a device.
Device Description Language DDL
A standardized programming language (similar to C) used to
write device descriptions.
Device Tag User-defined identifier for device.
Event
An instantaneous occurrence that is significant to scheduling
block execution and to the operational (event) view of the
application.
FOUNDATION fieldbus FF
Communications protocol for a digital, serial, two-way
system that interconnects industrial field equipment such as
sensors, actuators and controllers.
Function Block FB
An executable software object that performs a specific task,
such as measurement or control, with inputs and outputs
that connect to other entities in a standard way.
Function Block Application Process FBAP
The part of the device software that executes the function
blocks (PID, AO, transducer, or resource blocks).
Link Active Scheduler LAS
A device which is responsible for keeping a link operational.
The LAS executes the link schedule, circulates tokens, distrib-
utes time messages and probes for new devices.
Macrocycle
The least common multiple of all the loop times on a given
link.
Manufacturer’s Signal Processing MSP
A term used to describe signal processing in a device that is
not defined by FF specifications.