Fluid Components International ST100 Series PROFIBUS PA - Manual (Page 5)

ST100 Series Profibus PA
Fluid Components International LLC 1
Introduction
This manual describes the ST100 PROFIBUS PA features, operation and configuration. The ST100 can provide up to 4 different process
variables. It provides Flow, Temperature, Flow Totalizer, and Pressure, as outputs. The flow output can be selected as a volumetric flow, Mass flow or
Velocity flow, depending on the model of the ST100. The basic ST100 can support up to two flow sensors and provides the average flow of the two
sensors in a single output.
This document is written to be used with all members of the ST100 family of products that use the ST100 PROFIBUS PA digital communication
Protocol.
The ST100 is compliant with the “PROFIBUS profile for Process Control Devices” specification Version 3.02. Profile: Multi-Variable Device.
The PROFIBUS PA is a master slave communication protocol. The ST100 with PROFIBUS PA has been configured as a “Multi-variable “ device. It
implements both “Classical” and “Condensed” status and diagnostics. The ST100 PROFIBUS PA instrument also supports the Automatic
Indent_Number adaptation feature.
The physical layer of the ST100 PROFIBUS PA instrument implements the H1 MBP interface; it operates at a baud rate of 31.25 Kbits/sec, and it
supports power and signal on the same wires.
PROFIBUS PA is provided through an extension card that is fully integrated into the ST100 instrument.
Definition
Physical Block: This block describes the necessary parameters and functions of the device or the device hardware itself.
Function Blocks: These blocks describe the functions of the device executing within the automation system. An example of a Function Block is the
Analog Input (AI) block.
Transducer Block: This block contains the parameters of a device representing the necessary parameters and functions of the connection to the
process. For example in the ST100 PROFIBUS PA the parameters are flow, temperature, FCI Totalizer, and pressure. The ST100 has two transducer
blocks, Process TB and a Service TB. The Service TB is used for limited instrument configuration, some troubleshooting.
Analog Input (AI) Blocks: These blocks receive the ST100 Process Data Variables from the Process Data Transducer Block of the ST100 and make
the process data of the ST100 available to other function blocks at the output.
There are 4 AI blocks in the ST100; Flow AI Block, Temperature AI Block, Totalizer AI Block, and Pressure AI block. Not all Process Variables are
available in every member of the ST100 family.
Totalizer Blocks: The TOTALIZER block integrates (accumulates) the rate (i.e. Flow rate) to the corresponding integral. For example the ST100
offers two ways of providing the Totalize output of the Flow Rate; the FCI internally calculated “TOATLIZER” , or the PA Totalizer Function Block. The
user can choose one or the other. Only one can be use at a time.
GSD Files: The GSD file is an electronic device data sheet or device data base file that identifies the ProfiBus device. All Profibus devices (class 1
masters and slaves) have their own GSD files.
FCI Configurator: A software tool that gives access to the ST100 functions and features. It facilitates basic instrument setup and configuration, as
well as advance functions. The FCI configurator can interface through the ST100 USB Service port or the Ethernet Service port.