Rockwell Automation 1398-PDM-xxx IQ Master Version 3.2.4 for IA-2000 and IQ-5000 Positioning Drive Modules, IQ-55 - Manual (Page 302)

280 Language Reference • Reference
Publication 1398-PM601A-EN-P — October 2000
WORDS
WHILE While Program Structure
Purpose The WHILE condition statement executes the statement(s) repeatedly while the condi-
tion specified is TRUE.
Syntax WHILE condition statement(s)
condition The condition to be tested. The condition may be a comparison,
an input being ON or OFF, or a flag being ON or OFF.
Comparisons compare the values of two operands and determine
if the condition is TRUE or FALSE. A comparison may be
greater than (>), less than (<), equal to ( = ), not equal to (<>),
less than or equal to (< = ), or greater than or equal to (> = ). The
operands of a comparison may be user variables, system vari-
ables, analog input values (ADC), or constants.
I1 ON ;an input
F1 ON ;a user flag
INPOSN ;system flag
G1 > G2 ;comparison user variable
G1 > POS1 ;comparison system variable
POS2 <= 7.00 ;comparison constant
statement(s) Any valid language statement. Multiple statements can enclosed
in curly braces {}.
Remarks Unlike the Do While statement, the condition is tested before any statement in the loop
is executed. If the condition is FALSE when the loop begins, the loop body is never
executed.
See Also DO/WHILE, IF
Example WHILE (POSN<120) ;execute statements while the
{ ; position is less than 120
... Statements
}