PLC Guide Introduction to PLC Function Block Structured Text

Smart FB Library
The Smart FB Library is a set of function block elements that improve interoperability between OMRON PLC Units and FA components. If
this library is used, it is not necessary to create a ladder program to use basic Unit and FA component functions. This enables the user to
reduce the time spent on previous task, such as determining how to use the device’s functions.
Online Editing of FB Definitions
FB definitions can be changed during operation, so FB definitions can be edited quickly during debugging. In addition, FBs can be used
with confidence even in equipment that must operate 24 hours/day.
Nesting
Not only can programs be created with nested OMRON FBs, it is possible to make easy-to-understand, stress-free operations by switching
windows depending on conditions and displaying structures in a directory-tree format.
Protecting FB Definitions
It is possible to prevent unintentional or unauthorized changes or disclosure of the program by setting passwords for the function block
definitions allocated in the project file and protecting the definitions based on their purpose.
Offline Debugging with the Simulator
The PLC program’s operation can be checked on the desktop, so program quality can be improved and verified early on. Both the ladder
and ST can be executed in the computer application.
String Operations for Variable Support
The functions that perform string data operations in ST language not only support string variables, they also strengthen the instructions
(functions) used to communicate with string data I/O.
FB Generation Function
Existing PLC programs can be reused and easily converted to FBs.