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Reference manual FOUNDATION Fieldbus Control module
DOC.RM.BQC54.E Rev: 1
February, 2016
Preliminary Field Trial
Documentation
1.2 Foundation Fieldbus™ Communication
The Bettis Q-Series QC54 module uses the Founda-
tion Fieldbus™ protocol to communicate with other
elddevicesandthehostsystem.Foundation Field-
bus™ is an all-digital, serial, two-way communica-
tionsystem,whichinterconnectseldequipment
such as transmitters, valve controllers, and process
controllers.Fieldbusisalocal-areanetwork(LAN)
for devices used in both process and manufacturing
automation with built-in capability to distribute the
control application across the network.
Theeldbusenvironmentisthebaselevelgroupof
digital networks in the hierarchy of plant networks.
Theeldbusretainsthedesirablefeaturesofanalog
systems such as:
A standardized physical interface to the wire
Bus-powered devices on a single wire pair
Intrinsic safety options
In addition, use of FOUNDATION Fieldbus™ enables:
Increased capabilities due to full digital communi-
cations
Reduced wiring and wire terminations due to mul-
tiple devices on a single pair of wires
Increased selection of suppliers due to interoper-
ability
Reduced loading on control room equipment avail-
able by distributing control and input/output func-
tionstoelddevices
Speed options for process control and manufactur-
ing applications
For more information on the operation of the FOUNDA-
TION Fieldbus™, refer to your DeltaV documentation
and the FOUNDATION Fieldbus™specications.
1.3 DeviceDescriptionandMethods
This manual describes device setup using the Device
Descriptions(DD)speciedbytheFOUNDATION Field-
bus™ protocol. Parameter access and methods are
also described in this manual. FOUNDATION Fieldbus™
uses the DD, Function Blocks, and a Capabilities
File to achieve interoperability between the module
andeldbuscomponentsfromothermanufactur-
ers in the control systems including hosts and other
devices. The DD provides information to describe
the data interface to the device while the Capabilities
File provides information about the device to enable
the creation of a control strategy without a physical
device(off-lineconguration).
Foreldbusdevices,inadditiontoprovidingparam-
eterdenitionsandotherinformationrequiredbythe
control system to communicate with the device, the
DD may also include methods. Methods can be used
for a variety of functions including remote restarting
of the control module. Methods are a predetermined
sequence of steps using a structured programming
languageandtheinterfacedenitionforthemodule.
How the method prompts and how messages appear
is determined by the host system. For information on
using methods on the host system, see Appendix E
and the appropriate host system documentation.
1.4 Node Address
The default node address of the Bettis Q-Series
QC54moduleis247(status=standby).
Use the host system to commission the module and
assign it a working address. For information on using
the host system for device commissioning and as-
signing addresses, see the appropriate host system
documentation.
1.5 Foundation Fieldbus™ function
blocks
Functionblocks,withinaeldbusdevice,performthe
various functions required for process control, such
as process variable input, output, and control func-
tionssuchasProportional/Integral/Derivative(PID)
functions. The standard function blocks provide a
commonstructurefordeningfunctionblockinputs,
outputs, control parameters, events, alarms, and
modes. Then, function blocks can be combined into
a process that can be implemented within a single
deviceorinmultipledevicesviatheeldbusnetwork.
The following function blocks are implemented in the
Bettis Q-Series module.
ResourceBlock(RB)
TransducerBlock(TB)
AnalogInput(AI)FunctionBlock
DiscreteOutput(DO)FunctionBlock
2xDiscreteInput(DI)FunctionBlock
PID Function Block
Function Block parameters and usage is described in
the host system documentation. Please refer to this
documentation for detailed information on function
blocks.
