ST100 Series Profibus PAFluid Components International LLC 1IntroductionThis manual describes the ST100 PROFIBUS PA features, operation and configuration. The ST100 can provide up to 4 different processvariables. It provides Flow, Temperature, Flow Totalizer, and Pressure, as outputs. The flow output can be selected as a volumetric flow, Mass flow orVelocity 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 twosensors 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 communicationProtocol.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. Itimplements both “Classical” and “Condensed” status and diagnostics. The ST100 PROFIBUS PA instrument also supports the AutomaticIndent_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 itsupports power and signal on the same wires.PROFIBUS PA is provided through an extension card that is fully integrated into the ST100 instrument.DefinitionPhysical 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 theAnalog Input (AI) block.Transducer Block: This block contains the parameters of a device representing the necessary parameters and functions of the connection to theprocess. For example in the ST100 PROFIBUS PA the parameters are flow, temperature, FCI Totalizer, and pressure. The ST100 has two transducerblocks, 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 makethe 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 areavailable 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 ST100offers two ways of providing the Totalize output of the Flow Rate; the FCI internally calculated “TOATLIZER” , or the PA Totalizer Function Block. Theuser 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 1masters 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, aswell as advance functions. The FCI configurator can interface through the ST100 USB Service port or the Ethernet Service port.