ProSoft Technology ProLinx S3964R Uživatelský manuál stáhnout pdf (Strana 51)

Publication LOGIX-AP010B-EN-P - May 2010 51

Software Conversions - Program Structure Chapter 2

One of the first decisions in developing a Logix 5000 project is to define the

functions or operations of your machine or process.

1. Identify the major functions/operations of your machine or process.

2. For each function, choose the programming language that best fits the

function.

• This may require revising the functions list to take advantage of other

languages.

• Use any combination of the languages in the same project.

If the function or group of functions represent Use this language

Continuous or parallel execution of multiple operations

(not sequenced)

Ladder Logic (LD)

Boolean or bit-based operations

Complex logical operations

Message and communication processing

Machine interlocking

Operations that service or maintenance personnel must

interpret to troubleshoot the machine or process

Continuous process and drive control

Function Block Diagram (FBD)Loop control

Calculations in circuit flow

High-level management of multiple operations

Sequential Function Chart

(SFC)

Repetitive sequences of operations

Batch process

Motion control with structured text

State machine operations

Complex mathematical operations

Structured Text (ST)Specialized array or table loop processing

ASCII string handling or protocol processing

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ProSoft Technology ProLinx S3964R Uživatelský manuál Strana 51