Glossary Of Terms - rotork Mk3 Technical Manual

Foundation Fieldbus CP Option Card Technical Manual

Glossary of Terms:

Automatic (AUTO)
Basic Device
Back calculation output
(BKCAL_OUT)
Capabilities File
Cascade (CAS)
Device Description (DD)
Fieldbus
Fieldbus Interface Card (FIC) The option card fitted to the actuator which provides the
Function Block (FB)
H1
Initialization Manual
Interoperability
Input / Output Options
(IO_OPTS)
Link Active Scheduler (LAS) One Link Master (LM) device functions as the fieldbus LAS at any one
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A possible mode of a function block which means the block runs its
algorithms, producing data at its inputs or outputs.
A basic device is any device not having the capability to control
communications on an H1 fieldbus segment.
This parameter is available on output function blocks, and provides a
feedback mechanism to control blocks such as PID.
A file describing the communication objects in a fieldbus device. A
configuration device can use Device Description (DD) Files and
Capabilities Files to configure a fieldbus system without having the
fieldbus devices online.
A possible mode of a function block which refers to an input derived
from the output of another function block.
A machine-readable description of all the blocks and block parameters
of a device.
The digital, two-way, multi-drop communication links.
communications interface between the DCS and the actuator.
Also known as standard function block. This is a named block
consisting of one or more inputs and outputs. These are built into
fieldbus devices to achieve the desired control functionality. The FF
CP has Analogue Input (AI), Analogue Output (AO), Digital Input (DI),
Digital Output (DO), Control Selector (CS) and PID control (PID).
A term used to describe a FF highway operating at 31.25 kbit/sec.
(IMAN)
The forward path to a physical output is broken and the output is
tracking the downstream block. This will result in the control action
being suspended.
The capability for a device from one manufacturer to interact with that
of another manufacturer, on a fieldbus network, without loss of
functionality.
This parameter is contained within output function blocks and
allows different parameters to appear at various connection points.
time. The LAS is the Fieldbus device that is currently controlling
access to the Fieldbus. A device that is responsible for keeping a link
operational. The LAS executes the link schedule, circulates tokens,
distributes time, and probes for new devices.
Publication PUB089-005-00_0618