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2.4.1
Central Programming
2.4.2
Program Display
Sequential function chart
Instructions list
Function diagram
Ladder diagram
Structured text
1070 072 263-101 (01.08) GB
The PLC program can be created with a programming device or a computer;
a controller is not necessary. It will be loaded into the controller via the
WinSPS utility program.
The following is available as a programming language:
D Sequential function chart
D Instructions list
D Function diagram
D Ladder diagram
D Structured text (since WinSPS 3.1)
D High-level language ANSI "C" (since WinSPS 3.1)
The sequential function chart (SFC) is a graphic programming surface that
describes the machine's functions to be processed sequentially in form of a
sequencer. This representation will be translated into the executable pro-
gramming language "instructions list". Only then it can be loaded into the
CL550.
The instructions list (IL) is a textual programming language that is used to
describe the control tasks in assembly notation.
The "function diagram" (FUD) programming language is used to describe
the logic links with graphical symbols.
The "ladder diagram" (LD) programming language is used to describe the
control tasks with standard circuit diagram symbols.
The structured text (ST) is a textual programming language of the IEC
61131-3. ST is an easy to learn high-level language that serves to formulate
programming tasks in a compact way. ST is very well suited to perform e.g.
very complex inspection and controlling tasks.
System Overview CL550
2–5
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