Yokogawa YVP20S - Manual (Page 172)

App-3
IM 21B04C50-01E
<Toc> <Ind> <APPENDICES>
TA01-3.EPS
HSE Linking Device An HSE Linking Device is a device used to interconnect H1 fieldbus Segments to High Speed
Ethernet (HSE) to create a larger network.
HSE Switch An HSE Switch is standard Ethernet equipment used to interconnect multiple High Speed Ethernet
(HSE) devices such as HSE Linking Devices and HSE Field Devices to form a larger HSE network.
NAMUR NAMUR is a European user association of process control technology in chemical and
pharmaceutical industries. “Recommendations and Worksheets are experience reports and working
documents prepared by NAMUR for its members among process control users for facultative
utilization”. NAMUR issued a recommended accessory mounting for control valves (NE 14 Anschluß
von Schwenkantrieben an Armaturen 06.08.96) which describes a method for mounting a positioner
on an actuator. See more at www.namur.de
P P is a dimensionless gain factor related to the proportioning action of the algorithm. It ranges from 0
to 5000. Common values for the positioner are 50 for small valves up to 4000 for large valves.
Physical Layer The Physical Layer receives messages from the Communications Stack and converts the messages
into physical signals on the fieldbus transmission medium, and vice-versa.
I Integral time or reset time, is the time constant of integral control. Higher values of I cause slower
integral action. A value of zero disables integral action.
Network Management
(NM) Network Management (NM) permits FOUNDATION Network Manager (NMgr) entities to conduct
management operations over the network by using Network Management Agents (NMAs). Each
Network Management Agent (NMA) is responsible for managing the communications within a
device. The NMgr and NMA communicate through use of the Fieldbus Messaging Specification
(FMS) and Virtual Communications Relationship (VCR).
Non-Volatile memory Computer memory which is not lost when power is turned off.
Out of Service State- The YVP positioner transducer, resource and Analog Output, PID blocks are in Out of Service mode.
PID Proportion Integral Derivative Control Block
Normal State- The normal set of target modes for the function blocks
PC As used in this manual, a personal computer or laptop running under Windows 2000/XP, or later
operating system.
HSE Field Device An HSE Field Device is a fieldbus device connected directly to a High Speed Ethernet (HSE)
fieldbus. Typical HSE Field Devices are HSE Linking Devices, HSE Field Devices running Function
Blocks (FBs), and Host Computers.
I/P Converter The electro-magnetic device which converts low energy electrical current signal to a pressure which
is then amplified by the pneumatic relay.
Input/Output (I/O)
Subsystem Interface An Input/Output (I/O) Subsystem Interface is a device used to connect other types of
communications protocols to a fieldbus Segment or Segments.
Interchangeability Interchangeability is the capability to substitute a device from one manufacturer with that of another
manufacturer on a fieldbus network without loss of functionality or degree of integration.
Interoperability Interoperability is the capability for a device from one manufacturer to interact with that of another
manufacturer on a fieldbus network without loss of functionality.
ISA The Instrument Society of America. ISA develops and publishes international standards for use in
process control. See www.isi.org
Link A Link is the logical medium by which H1 Fieldbus devices are interconnected. It is composed of one
or more physical segments interconnected by bus Repeaters or Couplers. All of the devices on a link
share a common schedule which is administered by that link’s current LAS.
Object Dictionary An Object Dictionary (OD) contains all Function Block (FB), Resource Block (RB) and Transducer
Block (TB) parameters used in a device. Through these parameters, the blocks may be accessed
over the fieldbus network.
Parameter The data objects in Foundation fieldbus are identified in the form of TAG.PARAMETER. Each data
object is a parameter that may include many elements such as an array, or a value and a status.
Elements of a parameter are referred to by sub-index.
Link Active Scheduler
(LAS) A Link Active Scheduler (LAS) is a deterministic, centralized bus scheduler that maintains a list of
transmission times for all data buffers in all devices that need to be cyclically transmitted. Only one
Link Master (LM) device on an H1 fieldbus Link can be functioning as that link’s LAS.
Link Master (LM) A Link Master (LM) is any device containing Link Active Scheduler (LAS) functionality that can
control communications on an H1 fieldbus Link. There must be at least one LM on an H1 Link; one
of those LM devices will be elected to serve as LAS.
Link Object A Link Object contains information to link Function Block (FB) Input/Output (I/O) parameters in the
same device and between different devices. The Link Object links directly to a Virtual
Communications Relationship (VCR).
Multidrop A variation of the HART Communications Protocol which allows many smart field devices to draw
power from, and to communicate over a single pair of wires.