Rockwell Automation 57C329 Remote I/O Communications, AutoMax - Manual (Page 70)

4Ć8
4.7 Application Programming
The variable names assigned to registers and bits during
configuration are referred to as common variables. These are made
available to BASIC and Control Block application tasks through the
COMMON statement. Ladder Logic/PC tasks can access these
variables simply by referencing them in their sequences. The
remainder of this section provides application task examples.