
3. THE STEP SEQUENCE FUNCTIONS
1.
1.1
The
OVERVIEW
What is a Step Sequence ?
step sequence is one method for programming the sequence control governed by a
programmable controller. This method features the direct representation of the control flow on a
flow chart. Each block of processing is described as a subprogram, using the ladder method.
Therefore it provides an easy-to-understand visualized flow of the processes and is well-suited to
the control of entire processes.
For details of the step sequence method, refer to the following manual.
” FANUC PMC-MODEL PA1 /PA3/RAl /FWWtA3/RB/RB2/RB3/RB4/RBS/RB6/RC/RC3/RC4~NB/NB2
PROGRAMMING MANUAL(LADDER LANGUAGE) B-61863/06”
1.2 Programming with the Step Sequence Method
The programming with step sequence method is supported by Fapt ladder, not but by
editing function on FANUC PMC-MODEL RB4!RB6/RC4/NB2.
Setting a model in Fapt ladder decides which method, step sequence or ladder, is used.
1.3 A Program Configuration Screen
the built-in
If a model that supports the step sequence function is selected, a program can be edited in units of
subprograms. To enable this, a subprogram configuration screen has been added.
This screen lists subprograms, and supports the selection and editing of a target subprogram.
EDIT(LADDER/STEP SEQUENCE)
RCa(STEP SEQ) [A:yFLYDATAYSFCOl]
PROGRAM:(STEP SEQUENCE DEMO PROGRAM)
0 LEVEL1 0 LEVEL2 0 LEVEL3
i0"'tiUOO1.' 0 PO002 0 PO004
0 PO005 0 PO006 0 PO007
0 PO008 0 PO009 0 PO014
0 PO015 0 PO016 0 PO017
0 PO021 0 PO022 0 PO024
0 PO025 0 PO026 q ]POO27
. . . . . .
. . . . . .
0 PO101 0 PO202 0 JPO304
q ]PO405 0]PO406 q JPO407
Sub-program : PO001
I
DELETE
I
NEW ZOOM
3-l