SMAR FI302, Руководство по эксплуатации, техническому обслуживанию и инструкциям

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Section 3
3.1
Configuration
One of the many advantages of Fieldbus is that device configuration is independent of the
configurator. The
FI302 may be configured by a third party terminal or operator console. Any
particular configurator is therefore not addressed here.
The FI302 contains three output transducer blocks, one resource block, one display transducer
block and function blocks.
Function Blocks are not covered in this manual. For explanation and details of function blocks, see
the “Function Blocks Manual”.
Transducer Block
Transducer block insulates function block from the specific I/O hardware, such as sensors,
actuators. Transducer block controls access to I/O through manufacturer specific implementation.
This permits the transducer block to execute as frequently as necessary to obtain good data from
sensors without burdening the function blocks that use the data. It also insulates the function block
from the manufacturer specific characteristics of certain hardware.
By accessing the hardware, the transducer block can get data from I/O or passing control data to it.
The connection between Transducer block and Function block is called channel. These blocks can
exchange data from its interface.
Normally, transducer blocks perform functions, such as linearization, characterization, temperature
compensation, control and exchange data to hardware.
How to Configure a Transducer Block
Each time when you select a field device on SYSCON by instantiating on the Operation menu,
automatically you instantiate one transducer block and it appears on screen.
The icon indicates that one transducer block has been created and by clicking twice on the icon, you
can access it.
The transducer block has an algorithm, a set of contained parameters and a channel connecting it to
a function block.
The algorithm describes the behavior of the transducer as a data transfer function between the I/O
hardware and other function block. The set of contained parameters, it means, you are not able to
link them to other blocks and publish the link via communication, defines the user interface to the
transducer block. They can be divided into Standard and Manufacturer Specific.
The standard parameters will be present for such class of device, as pressure, temperature,
actuator, etc., whatever is the manufacturer. Oppositely, the manufacturers specific ones are
defined only for its manufacturer. As common manufacturer specific parameters, we have calibration
settings, material information, linearization curve, etc.
When you perform a standard routine as a calibration, you are conducted step by step by a method.
The method is generally defined as guide line to help the user to make common tasks. The
SYSCON identifies each method associated to the parameters and enables the interface to it.
Terminal Number
The terminal number, which references a channel value, which is sent via internal, manufacturer-
specific from the specified transducer, output to function block.
It starts at one (1) for transducer number one until three (3) for transducer number three.
The channel number of the AO block is related to the transducer’s terminal number. Channel
number 1, 2, 3 corresponds bi-univocally to the terminal block with the same number. Therefore, all
the user has to do is to select combinations: (1.1), (2.2), (3,3) for (CHANNEL, BLOCK).