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2 Instructions
CP1E CPU Unit Instructions Reference Manual(W483)
Step Instructions
2
SNXT/STEP

(2) Branching Control

Additional Information:

•In the above example, where SNXT(009) is executed for W0.02, the branching 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-Programmer. 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.

•The above programming is used when steps A and B cannot be executed simultaneously. For simul-

taneous execution of A and B, delete the execution conditions illustrated below.

Step (A) W0.00 Step (B) W0.01
Step (C) W0.02
End
0.05 (Step (C) reset conditions)
0.01 (Step (A)
starting condition)
0.02 (Step (B) starting condition)
0.03 (Step (A) →
Step (C) transition
condition)
0.04 (Step (B) → Step (C)
transition condition)
STEP
W0.00
0.02
SNXT
W0.01
0.01
SNXT
W0.00
0.01
0.02
STEP
W0.01
0.03
SNXT
W0.02
0.04
SNXT
W0.02
STEP
W0.02
STEP
0.05
SNXT
W30.0
Step (A) ladder program
Step (B) ladder program
Step (C) ladder program

Step W0.00

(A)

Step W0.01

(B)

Step W0.02

(C)

0.02 0.01