Danfoss MCO 305, Design Manual, Page: 175 / 242

MCO 305 Design Guide
__ Software Reference __
MG.33.L4.02 – VLT
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175
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WAITT
Summary Time delay
Syntax WAITT t
Parameter t = delay time in milliseconds (maximum MLONG)
Description The WAITT command is suitable for achieval of a defined program time delay. The
inputted parameter shows the delay time in milliseconds.
NB!:
If an interrupt occurs during the delay time, then the entire delay procedure will be
re-begun following the processing of the interrupt.
The DELAY command is preferable to the WAITT command, because of its constant
time behavior.
Command Group CON
Cross Index DELAY, WAITI, WAITAX
Syntax Example WAITT 5000 /* wait 5 seconds */
WAIT T 5000 /* alternative form */
Program Sample WAIT_01.M
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WHILE . . DO . . ENDWHILE
Summary Conditional loop with start criteria. (While condition is fulfilled, repeat …)
Syntax WHILE condition DO
ENDWHILE
Parameter condition = abort criteria
Description By using the WHILE . . ENDWHILE construction you can repeat the enclosed
program area one or more times, dependent on any criteria. The loop criteria is
made up of one or more comparison operations, and is always monitored at the
start of a loop. When a negative result already appears at the first monitoring, this
can cause an omission of the commands within the loop, and the program will
continue after the ENDWHILE instruction.
NB!:
Depending on the loop criteria, it can happen that the contents of the loop will
never be processed.
To avoid an endless loop, the processed commands within the loop must have a
direct or indirect influence on the result of the abort check.
Command Group CON
Cross Index LOOP, REPEAT .. UNTIL
Syntax Example WHILE (A != 1 AND B == 0) DO
command line 1
command line n
ENDWHILE
Program Sample WHILE_01.M, INKEY_01.M