ElmoMC SimplIQ Software Manual - Manual (Page 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.