ProSoft Technology ProLinx S3964R User Manual download pdf (Page 36)

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

Chapter 2 Software Conversions - Program Structure

The nature of the application will determine how the tasks are divided into

programs. On smaller applications it may be suitable to include all the user

code in one program. The following example shows how the continuous task

is divided into the following three programs with each one containing its own

routines.

• Process Plant1

• Utilities

• Wastewater

Blocks/Routine

This section discusses anomalies involved in converting S5 Program Blocks

(PBs) and Function Blocks (FBs) to RSLogix 5000 routines.

The next level down from the OB in the Step 5 program structure will usually

contain Program Blocks (PBs) and possibly Function Blocks (FBs). Usually

OB1 will call a number of PBs and/or FBs with each block executing a distinct

function. The nature of the function depends on the particular application, but

typically could include functions such as Scaling Analog Inputs, Filling Process

Tank, or Controlling Process Temperature.

RSLogix 5000 software has a similar structure but uses different terminology.

Instead of the term Block, RSLogix 5000 software uses the term Routine.

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ProSoft Technology ProLinx S3964R User Manual Page 36