Flowserve 400MD Logix - Manual (Page 13)

Application
An application is software that contains function block data and operating parameters (objects) which help define the operation of a device
such as, sensor data acquisition or control algorithm processing. Some devices may contain more than one application.
Function Blocks
Usually, a device has a set of functions it can perform. These functions are represented as function blocks within the device. See Figure 1.5. Function blocks are
software that provide a general structure for specifying different device functions. Each function block is capable of performing a control func tion or algorithm.
Device functions may include analog input, analog output, and Proportional Integral Derivative (PID) control. These blocks can be connected together to build
a process loop. The action of these blocks can be changed by adjusting the block’s configuration and operating parameters.
Figure 1.5 Fieldbus Devices Contain Device Applications and Function
Logix 3400MD Digital Positioner Interface Application
The Logix 3400MD digital positioner contains the electronics interface compatible for connecting to a fieldbus network. Logix 3400MD digital
positioner application is configured using a fieldbus configura tion software program. The NI-FBUS Configurator software allows the user to
configure blocks, change operating parameters and create linkages between blocks that make up the Logix 3400MD digital positioner applica-
tion. The changes to the Logix 3400MD digital positioner application are then written to the device and initialized.
2 Installation Overview
2.1 Introduction
This section provides a list of components needed to install and operate the Logix 3400MD digital positioner. Also provided is a list of typical
start-up tasks and places where the user can find detailed information about performing the tasks.
2.2 Installation Components
Components Needed for Installation
The Logix 3400MD digital positioner contains electronics that enable it to operate using the FOUNDATION fieldbus . This digital interface requires a number of
components to provide control and data communications between field devices and the control room environment. Table 2.1 outlines the basic component
parts needed to install and operate the Logix 3400MD digital positioner on a fieldbus network.
Fieldbus Device
Device Application
Fieldbus LAN
Function Block
Block Parameters
Function Block
Block Parameters
Function Block
Block Parameters
Function Block
Block Parameters
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
13