4 . S e q u e n t i a l F u n c t i o n C h a r ts
M N 0 5 0 0 3 0 0 3 E F or m o r e i nf o r m a t i o n v i s i t : www. e a t o n. c o m
4 - 3
Icons shown
on SFC
toolbar
Description of Icons
Explanation:
Convergence of
condition diagram
Alternative convergence: Used to move from multiple
step points to the same single step point, each move
having a different transition condition.
Divergence diagram
Simultaneous divergence: Used to move from a single
step point to multiple subsequent step points using a
single transition condition. The subsequent step points
will execute cyclically.
Convergence
diagram
Simultaneous convergence: Used to move from multiple
step points to a single step point using a single transition
condition.
■
SFC Editing Environment:
In SFC mode, up to 16 columns can be used for programming, whereas there is no limit to rows.
Every dotted cell stands for one SFC symbol.
When programming in SFC, use the far left cell as the starting position and then work from left to
right, top to bottom. Each object (LAD, Step Point, and Transition) contains its own ladder logic
segment called
Inner Ladder
. The entire SFC diagram can be constructed first and then the inner
ladder of each SFC symbol can be created, or each SFC symbol and its internal ladder logic can be
developed simultaneously as the SFC structure diagram is constructed.
Содержание ELC-PB
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