Omron SYSMAC CS1D-PD Series Operation Manual page 47

CS1D Duplex System Overview and Features
Online Editing of Function Blocks
Input-Output Variables in Function Blocks
Function blocks can be created with CX-Programmer Ver. 9.7 or higher by the
user and pasted into normal programs. The standard function blocks provided
by OMRON in the OMRON FB Library can also be pasted into normal pro-
grams. Function blocks enable standard processing to be simply inserted into
a program as a single unit. Function blocks provide the following features.
• Function block algorithms can be written using ladder programming or
structured text (see note).
Note Structured text is a high level textual language designed for industrial
control (primarily PLCs) stipulated in IEC 61131-3. The structured
text supported by CX-Programmer Ver. 5.0 conforms to IEC 61131-
1.
• A single function block that has been created can be stored in a library for
easy reuse of standard processing.
• Programs that contain function blocks (ladder programming or structured
text), can also be uploaded or downloaded in the same way as normal
programs that do not contain function blocks. Tasks that include function
blocks, however, cannot be downloaded in task units (although they can
be uploaded).
• Array (one-dimensional) variables are supported, making it easier to han-
dle data specific to an application.
Moreover, the following functions can also be performed in function blocks
(FB).
Function block definitions can be changed during operation. This allows
function block definitions to be quickly corrected during debugging. It also
allows function blocks to be used more easily in systems that operate 24
hours a day.
Input-output variables can be used to passed large quantities of data, such
as table data.
D100 Parameter A
D101 Parameter B
D102 Parameter C
D103 Parameter D
D104 Parameter E
Section 1-1
FB
(INT)[]
Para1 --- Para1
D100
D100
7