Section 3
3.1
CONFIGURATION
This section describes the characteristics of the blocks in the TP303. They follow the Profibus PA
specifications, but in terms of transducer blocks, the input transducer block and display, they have
some special features on top of this.
The 303 Smar family is integrated in Simatic PDM, from Siemens. It is possible to integrate any 303
Smar device into any configuration tool for Profibus PA devices. It is necessary to provide a device
description or drive according to the configuration tool. In this manual is taken several examples
using Simatic PDM.
Offline Configuration
1. First run “Download to PG/PC” option to assure valid values.
2. Run after the Menu Device option to configure the required parameters using the related menus.
NOTE
It is not advisable to use the “Download to Device” option. This function can misconfigure the equipment.
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.
Transducer Block Diagram for Position Transmitter
Hall Sensor
Status
Characterization
100% ScaleIn.100%
0% ScaleIn.0%
ReadHallCalPointHi CalPointHi
ReadHallCalPointLo CalPointLo
Diagnostic Status
Hall Value OK
PrimaryValueRangeUnitIndex
Secondary_Value_2
Secondary_Value_Unit_2
%
mm
inch
degree
radian
Satured Hall (>65000)
No moviment or No magnet Part
Acq Hall Digital Hall
% %
Reverse
Direct
Secondary_Value_1
Secondary_Value_Unit_1
%
%
-20%
120%
Hall Characterization
Limiter
%=100-%
100% 100%
0% 0%
Primary_Value Characterization
Primary_Value
AI
Block
TOT
Block
Scale Out
All mass and
flow permitted
units, like LD303
Figure 3.1 - Transducer Block Diagram for Position Transmitter