3 PROGRAM ORGANIZATION UNITS
3.3 Function Blocks (FB)
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3
EN and ENO
In the same way as a function, EN (enable input) and ENO (enable output) can also be appended to a function block to control
execution processing.
Page 14 EN and ENO
When the instance of a function to which EN/ENO has been appended is called, an actual argument must be assigned to EN.
Creating programs
The program of a function block can be created by using the engineering tool.
[Navigation window] [FB/FUN] Right-click [Add New Data]
Select "Function Block" for "Data Type" in "Basic Setting".
The created program is stored in the FB file.
[CPU Parameter] [Program Setting] [FB/FUN File Setting]
Up to 64 created programs can be stored in one FB file.
For details on program creation, refer to the following.
■Types of program
There are two types of function blocks and the program of each function block type is stored in different ways.
• Macro type function block
• Subroutine type function block
For details, refer to the following.
Page 19 Operation overview
The above cannot be selected for module function blocks, standard functions, and standard function blocks.
Item Reference
How to create function blocks GX Works3 Operating Manual
Number of FB/FUN files that can be written to a CPU module MELSEC iQ-F FX5 User's Manual (Startup)
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