How To Use This Manual - Mitsubishi MELSEC-q Programming Manual

How to Use This Manual

A - 13
This Manual ...
Use this manual to perform structured text (hereafter abbreviated to ST)
programming with GX Developer. It is suitable for the users who have the knowledge
and programming experience of PLC ladder programs and for the users who have
the knowledge and programming experience of high-level languages such as the C
language.
"CHAPTER 1 OVERVIEW" describes the overview of the ST language, the features
of ST programming, and the ST program creation procedure.
"CHAPTER 2 SYSTEM CONFIGURATION" describes the applicable CPUs, ST
program specifications, etc.
"CHAPTER 3 HANDLING OF CHARACTERS AND NUMERIC VALUES IN ST
PROGRAMS" describes the types and representation methods of data used in ST
programs.
"CHAPTER 4 ST PROGRAM EXPRESSIONS" describes the expressions of the
operators, control syntaxes, etc. used in ST programs.
"CHAPTER 5 MELSEC FUNCTIONS" and "CHAPTER 6 IEC FUNCTIONS" describe
the arguments, return values and description examples of the functions used in ST
programs.
Operating Manual ...
The "GX Developer Operating Manual (ST)" consists of in-depth explanations of all
menus and menu options used to perform ST programming. Refer to the manual
when information on operation details is necessary.
When information on other than ST programming is necessary, refer to the "GX
Developer Operating Manual" or "GX Developer Operating Manual (Startup)".
When using the structured text language for the first time ...
Refer to the "First ST", which describes the outline of the ST language, the
procedures for creating an ST program using GX Developer and writing it to the PLC
CPU, the information necessary for that purpose, and others.
When you already have the knowledge of the ST language and want to start
programming immediately ...
Proceed to "CHAPTER 5 MELSEC FUNCTIONS". It describes the necessary items
for use of the functions in ST programs. When it is desired to know the data to be
used in ST programs, refer to "CHAPTER 3 HANDLING OF CHARACTERS AND
NUMERIC VALUES IN ST PROGRAMS". It describes the types and representation
methods of the data used in ST programs. When it is desired to use control syntaxes
in ST programs, refer to "CHAPTER 4 ST PROGRAM EXPRESSIONS". It describes
the formats and description examples of the control syntaxes used in ST programs.
The following explains the symbols and information used in this manual.
Symbol
Point Gives the section-related knowledge and necessary
information.
Remark Gives the section-related knowledge and useful
information.
[ ]
Menu name of menu bar
Description Example
REMARK
[Project]
A - 13