Omron CJ2 CPU UNIT SOFTWARE - Variables in Function Blocks

5-55
5 Understanding Programming
CJ2 CPU Unit Software User’s Manual
5-5 Symbols
5
5-5-6 Variables in Function Blocks
Programs in function blocks are all written with variables rather than actual addresses. Variables in
function blocks have different variable types and specifications than symbols outside of function blocks.
For details on variables in function blocks, refer to the CX-Programmer Operation Manual: Function
Blocks and Structured Text (Cat. No. W447).
z Function Block Variable Fields
5-5-6 Variables in Function Blocks
CLOCK PULSE
EN
(BOOL)
ON_TIME
(INT)
OFF_TIME
ENO
(BOOL)
tim_b
tim_a
TIMX tim_a OFF_TIME
TIMX tim_b ON_TIME
ENO
Ladder Diagram
Inside Function Blocks
Algorithm
Variables (e.g., input variables, output
variables, and I/O variables) for transferring
data between external programming and
programming in function blocks
Variables used only in function
blocks (internal variables and
external variables)