SMAR LD292, Руководство по эксплуатации, техническому обслуживанию и инструкциям

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Configuration
3.5
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.
The SYSCON configuration software can configure many parameters of the Input Transducer block.
Figure 3.1 - Function and Transducers Blocks
Lower and Upper Trim
Each sensor has a characteristic curve that establishes a relation between the applied pressure and
the sensor signal. This curve is determined for each sensor and it is stored in a memory together
with the sensor. When the sensor is connected to the transmitter circuit, the content of its memory is
made available to the microprocessor.
Sometimes the value on the transmitter display and transducer block reading may not match the
applied pressure.
The reasons may be:
As you can see the
Transducer and Display are
treated as special type of
Function Blocks, called
Transducer Blocks.
The device was
instantiated as LD292
Here, are some blocks
instantiated.
LD2EM301.CDR