Omron SYSMAC CJ - REFERENCE MANUAL 01-2008 Reference Manual page 957

Step Instructions
918
The above programming is used when steps A and B cannot be executed
simultaneously. For simultaneous execution of A and B, delete the execution
conditions illustrated below.
Note In the above example, where SNXT(009) is executed for W00002, the branch-
ing moves onto the next steps even though the same control bit is used twice.
This is not picked up as an error in the program check using the CX-Program-
mer. A duplicate bit error will only occur in a step ladder program only when a
control bit in a step instructions is also used in the normal ladder diagram.
Step W00000
(A)
Step (A) ladder program
Step W00001
(B)
Step (B) ladder program
Step W00002
(C)
Step (C) ladder program
000002 000001
Section 3-22