Flowserve 400MD Logix - Manual (Page 30)

The key elements of the FBAP are:
• Logix block objects and their parameters (and consist of the following block types)
• Resource block
• Transducer blocks
• PID Function block
• AO Function block
• DO Function block
• DI Function block
• IS Function block
• OS Function block
• Link Objects
• Alert Objects
• Trend Objects
• View Objects
• Domain Objects
Device Objects
Link objects allow the transfer of process data from one block to another. View, Alert and Trend objects handle function block parameters for
operator interface of views, alarms and events, and historical data. A brief description of these objects is presented in the following sections.
8.3 Block Description
Block Objects
Blocks are elements that make up the FBAP. The blocks contain data (block objects and parameters) that define the application, such as the
inputs and outputs, signal processing and connections to other applications. The Logix 3400MD digital positioner application contains the
following block objects:
• Resource block
• Main Transducer block
• Tech Transducer block
• MD Transducer block
• Analog Output (AO) function block
• Digital Output (DO) function block
• Digital Input (DI) function block (DI_HI and DI_LO)
• Proportional Integral Derivative (PID) controller function block
• Input Selector (IS) function block
• Output Selector (OS) function block
Section 10.15 describes the funtion block execution times.
Table 8.1 briefly describes the operation of these blocks.
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
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