Flowserve MX FOUNDATION Fieldbus Field Unit - Manual (Page 80)

MX/QX FOUNdaTION Fieldbus Field Unit FCd LMENIM2330-01 – 08/11
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Glossary
Communications Protocol A standard for transferring data between intelligent devices, such as a
Master Station, distributed control system, programmable controller, or a computer.
DCS Distributed Control System. Geographically distributed intelligent control devices communi-
cating over a digital network (bus).
Device Description Software loaded into the master station that describes the characteristics and
parameters of the fieldbus-mounted device.
Device Type Manager (DTM) The DTM is a device driver that provides a unified structure for
accessing device parameters, configuring and operating the devices, and diagnosing problems. A
Device DTM is provided by the device manufacturer and represents the specific logic and parameters
of the device. This standardized interface can be used in any FDT Frame Application.
EIA Electronic Industries Association, an organized body of manufacturers that sets interface
standards for the electrical and electronic industry, see RS-232C and RS-485.
Field Device Tool Frame Application A software program that implements DeviceDTMs and
CommDTMs. The Frame Application provides:
1) Common environment
2) User Management
3) DTM Management
4) Data Management
5) Network Configuration
6) Navigation
Foundation fieldbus A standard allowing intelligent field-mounted devices such as valves and
transmitters to communicate with each other and with a master station such as a DCS.
Function Blocks A standard graphical representation of the control and measurement tasks that
take place in the field devices, used for easy system configuration.
Gateway A device in a DDC-100 serial communication system to translate one set of commands to
another set of commands that can be understood by other user-supplied devices in the system, for
example a Master Station.
LED Light Emitting Diode, a semiconductor diode that emits light when current passes through it,
used for various displays in industrial systems and consumer products.
Link Active Scheduler The fieldbus device responsible for scheduling communication with, and
operation of each of the devices on the fieldbus network.
Modem Modulator/demodulator, hardware that converts serial digital bit streams into audio
frequency signals when transmitting or modulating data, then changes the audio frequencies back
into digital streams when receiving or demodulating data.
MX/QX FF The intelligent Foundation fieldbus board residing in the Limitorque actuator that
communicates with the master station and controls actuator.
Parallel Data Transmission The transmission of digital data bits in parallel over several wire
Compare to serial data transmission