Allen-Bradley 1757-FFLD2, User Manual

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Rockwell Automation Publication 1757-UM012A-EN-P - July 2011 173
Glossary
fieldbus
A digital, two-way, multi-drop communication link among intelligent
measurement and control devices. It serves as a Local Area Network (LAN) for
advanced process control, remote input/output and high-speed factory
automation applications.
Fieldbus Foundation The organization that developed a fieldbus network specifically based upon the
work and principles of the ISA/IEC standards committee.
FOUNDATION Fieldbus
The communication network that the Fieldbus Foundation created.
function block
A named block consisting of one or more input, output, and contained
parameters. The block performs some control function as its algorithm. Function
blocks are the core components with which you control a system. The Fieldbus
Foundation defines standard sets of function blocks.
gateway Translates another protocol to FOUNDATION fieldbus or vice versa, for
example HART to FOUNDATION fieldbus or Modbus to
FOUNDATION fieldbus.
H1 A fieldbus segment that operates at 31.25 Kbps.
H1 field device A fieldbus device connected directly to an H1 FOUNDATION fieldbus, such as
valves and transmitters.
host
Control system that has FOUNDATION fieldbus capabilities to configure and
operate FOUNDATION fieldbus segments. There are several classes of Host
systems:
•
Class 61 - Integrated Host - Primary, or process Host that manages the
communication and application configuration of all devices on the
network.
•
Class 62 - Visitor Host - Temporary, on process Host with limited access to
device parameterization.
•
Class 63 - Bench Host - Primary, off process Host for configuration and
setup of a non-commissioned device.
•
Class 64 - Bench host - Primary, off process Host with limited access to
device parameterization of an off-line, commissioned device.
•
Class 71 - Safety Integrated Host - Primary, on-process Host that manages
the communication and application configuration of all safety and control
and monitoring devices on a network.
HSE
Acronym for
High-speed Ethernet, a network with FOUNDATION Fieldbus
protocol that integrates H1 for distributed process control applications with a
high-speed technology for advanced hybrid, batch, and manufacturing
applications, and provides for information integration with plant management
systems.