Constructs; Some Key Words Are Reserved - Allen-Bradley Logix5000 Reference Manual

Appendix C Structured Text Programming

Constructs

If you want to
Do something if or when specific conditions occur
Select what to do based on a numerical value
Do something a specific number of times before
doing anything else
Keep doing something as long as certain conditions
are true
Keep doing something until a condition is true
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Constructs can be programmed alone or nested within other constructs.
Use this construct
IF...THEN
CASE...OF
FOR...DO
WHILE...DO
REPEAT...UNTIL

Some Key Words are Reserved

These constructs are not available:
• GOTO
• REPEAT
RSLogix 5000 software will not let you use them as tag names or constructs.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
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