Elmomc SimplIQ Software Manual Instrukcja Użytkownika Pobierz pdf (Strona 40)

SimplIQ Software Manual 4BThe SimplIQ User Programming Language

MAN-SIMSW (Ver. 1.4)

5-11

5.5 Comments

Comments are texts that are written into the code to enhance its readability. They can be

written in three ways, as indicated in the following sections.

5.5.1 Double Asterisk

A comment starts with a double asterisk (

) marker and terminates at the next end of line.

The drive ignores the comments when running a program or evaluating an expression.

Example:

**my first program

PX=1

**UM=5

MO=1; **motor on

In this program, the first line is a comment used to enhance program readability. The

comment terminates at the next end of line, so that the

PX=1

instruction will be compiled

and executed. In the third line, the comment marker tells the drive to ignore the

UM=5

command. This technique is useful for temporarily masking program lines in the process of

debugging. The last line demonstrates that a comment may start anywhere in the program

line. The

MO=1

instruction preceding the comment marker will be compiled and executed.

5.5.2 Double Slash

A double slash marks comments in the same way as a double asterisk. The comment starts

with a double slash marker and terminates at the next end of line.

Example:

//my first program

PX=1

//UM=5

MO=1; //motor on

In this example, the double slash acts exactly like the double asterisk from the previous

example.

5.5.3 C-style Start and End Comment

In the C-style method of marking comments, the comment begins with a start comment

mark (/*) and terminates with the end comment mark (*/). This enables the user to close

text in the middle of an expression, or to close several text lines.

Example:

This is a multiple line comment.

All this text is ignored.

if ( 1 / x == 1 */)

y=1;

end

The expression

y = 1

will always be executed. The

x==1

condition enclosed by the comment

markers is ignored.

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