Rockwell Automation 1398-PDM-xxx IQ Master Version 3.2.4 for IA-2000 and IQ-5000 Positioning Drive Modules, IQ-55 - Manual (Page 175)

IQ Programming Structure • Miscellaneous Structure Instruction 153
Publication 1398-PM601A-EN-P — October 2000
TUTORIAL
Miscellaneous Structure Instruction
As you write any program, one of your goals should be to make the program easily understood by others
that may be required to read or maintain the program in the future. The following are guidelines that
will make your programs easier to develop and maintain:
• Use a lot of comments. There is no such thing as having too many comments in a program. These
comments will be invaluable in the future when you or someone else attempts to modify the pro-
gram to add new features into your application.
• Use the ASSIGN command to assign meaningful names to variables, inputs and outputs. This will
make the program easier to write, read, and debug.
• Keep a revision history of program modifications embedded in the comments at the top of your
application program.
Miscellaneous Structure Instructions Summary
The following is a summary of the miscellaneous structure related commands discussed in this section.
Refer to Part 5
•
Language Reference for more detailed information.
Name Description
PGMTYPE = type Compiler option for program type
DEBUG = ON/OFF Compiler option for debug information
ASSIGN name text Assign a name to a text string or variables
TITLE "name" Define a program title
;comment Comment in the program
END End of the program