Manual

Chapter 3
Publication 17716.5.99 - December 1995
Edit Your Ladder Logic
Program
To initiate communication between the CFM module and your
PLC processor, you must enter block transfer instructions into your
ladder logic program. Use this chapter to enter the necessary block
transfer instructions into your ladder logic program.
To edit your ladder logic you See page
Enter Block Transfer Instructions. . . . . . . . . . . . . . . . . . . . .
3-1
PLC2 Family Processors. . . . . . . . . . . . . . . . . . . . . . . . 3-2
PLC3 Family Processors. . . . . . . . . . . . . . . . . . . . . . . . 3-3
PLC5 Family Processors. . . . . . . . . . . . . . . . . . . . . . . . 3-4
PLC5/250 Processors. . . . . . . . . . . . . . . . . . . . . . . . . .
3-5
The CFM module communicates with the PLC processor through
bidirectional block transfers. This is the sequential operation of both
read and write block transfer instructions.
Before you configure the CFM module, you need to enter block
transfer instructions into your ladder logic. The following example
programs illustrate the minimum programming required for
communication to take place between the CFM module and a PLC
processor. These programs can be modified to suit your application
requirements.
What This Chapter
Contains
Enter Block Transfer
Instructions