User manual

32 Publication LOGIX-AP010B-EN-P - May 2010
Chapter 2 Software Conversions - Program Structure
The following window shows the layout of tasks in an RSLogix 5000 project
and the folder icons used to indicate task types.
Continuous Task
In Step 5 there is only one continuously executed Organization Block and it is
always designated OB1. This Organization Block determines the sequence by
which the program blocks, function blocks and data blocks of the PLC
program are processed. The corresponding calls (conditional or unconditional)
for the blocks required are written in Organization Block 1 (OB1).
In RSLogix 5000 software, the equivalent to the Step 5 OB1 is the continuous
task that appears in an RSLogix 5000 project as follows:
Unlike Step 5, the existence of a continuous task is not compulsory in an
RSLogix 5000 project.
By right-clicking on the Main Task icon and choosing Properties, the
configuration menu for the continuous task is displayed.