SMAR FY301, Инструкция по эксплуатации и техническому обслуживанию

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Section 3
3.1
CONFIGURATION
The
FY301
Smart Valve Positioner is a digital instrument with the most up-to-date features a controlling
device can possibly have. The Hart
®
digital communication protocol enables the instrument to be
connected to a computer, in order to be configured in a very simple and complete way. Such computers
connected to the positioners, are called host computers. They can be either primary or secondary
masters. Even though Hart
®
is a master-slave type of protocol, it is possible to work with up to two
masters in a bus. Usually, the primary host, plays the supervisory role and the secondary host plays
the configurator role.
The positioners may be connected in a point-to-point or multidrop type network. In a point-to-point
connection, the equipment’s address must be "0". In a multidrop network, if the devices are recognized
by their addresses, the positioners should be configured with a network address between "1" and "15”.
In this case, the positioners’ output current is kept constant, at 4 mA each if the acknowledgement is
via Tag, the positioners addresses may be "0", and even in a multidrop configuration.
NOTE
In case of a multidrop network configuration for classified areas, the entity parameters allowed for the area shall be
strictly observed. Therefore, the following shall be checked:
Ca
≥ Σ
Ci
j
+ Cc La
≥ Σ
Li
j
+ Lc
Voc
≤
min [Vmax
j
] Isc
≤
min [Imax
j
]
Where:
Ca, La =
Allowed capacitance and inductance on the bus
Ci
j
, Li
j
=
Non protected internal capacitance/Inductance of positioner
j (j = up to 15)
Cc, Lc =
Cable capacitance and inductance
V
oc
= Barrier open circuit voltage
I
sc
= Barrier short circuit current
Vmax
j
=
Maximum allowable voltage to be applied to the instrument
j
Imax
j
=
Maximum allowable current to be applied to the instrument
j
The
FY301
Smart Valve Positioner includes a very encompassing set of Hart
®
command functions that
make it possible to access the functionality of what has been implemented. Such commands according
to the Hart
®
protocol specifications, and ar e grouped as universal commands, common practice
controls commands and specific commands. A detailed description of such commands may be found in
the manual entitled Hart
®
command specification -
FY301
Smart Valve Positioner.
Smar developed two types of configurators for its Hart
®
devices: CONF401 configurator and HPC401
configurator. CONF401 supports Windows platform (95, 98, 2000, XP and NT) and UNIX. It provides a
simple configuration, field device monitoring, and abi lity to analyze data and m odify field device
performance. The HPC401, is the most up-to-date technology in Palm platform Handheld portable
computers.
The operation and use characteristics of each one of the configurators are in their specific manual.
The figures below show the front of the Palm based configurator and CONF401 screen with active
advanced configuration.