Rockwell Automation 1757-FFLD Linking Device Configuration Manual - Manual (Page 145)

Publication 1757-PM002A-EN-E - June 2006
Glossary 3
HSE Switch 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.
IEC International Electrotechnical Commission. A technical standards committee which is
at the same level as the ISO.
Input Parameter A block parameter that receives data from another block.
Interchangeability 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.
Instantiable The ability of a function block to create multiple-tagged function blocks of different
types from a library as required by an application. Quantity per device is restricted by
device memory and other resources.
Interoperability The capability for a device from one manufacturer to interact with that of another
manufacturer on a fieldbus network without loss of functionality.
IS Intrinsic Safety.
ISA International Society for Measurement and Control.
Junction Box /
Quick Connection
Station Allows for quick installation of four to eight field instruments via Terminal connectors.
Link Logical - a connection between function blocks.
Physical - a connection between fieldbus devices.
Link Active
Scheduler (LAS) Executes the link schedule, circulates tokens, distributes time, probes for new devices,
and removes non-responsive devices from the link.
Link Master (LM) 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 Objects 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).
Loop See control loop.
m Prefix meaning milli- and has a value of 10 -3 .
Macrocyle Single iteration of a schedule within a device.
Methods An optional (but highly desirable) addition to Device Descriptions (DDs). Methods are
used to define/ automate procedures (such as calibration) for operation of field devices.
Mode Control block operational condition, such as manual, automatic, or cascade.
Network As applied in this document, is the termination of one or more fieldbus segments into
an interface card of the host system.
Noise AV Average noise in the network during the silence period between frames.
Object Dictionary 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.
Term Definition