SMAR IF302, Operation, Maintenance & Instruction Manual

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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
IF302
may be configured by a third party terminal or operator console.
The
IF302
contains three input 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 and
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 blocks
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 Input/Output Function blocks is called channel.
Normally, transducer blocks perform functions, such as linearization, characterization, temperature
compensation, control and exchange data to/from hardware.
How to Configure a Transducer Block
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, 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 by 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
configurator identifies each method associated to the parameters and enables the
interface to it.
Terminal Number
The terminal number, which references a physical input, which is sent internally 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 AI 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).