HEIDENHAIN TNC 406 - Manual (Page 215)

194 10 Programming: Q Parameters
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.5 If-Then Decisions with Q P
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10.5 If-Then Decisions with
Q Parameters
Function
The TNC can make logical If-Then decisions by comparing a
Q parameter with another Q parameter or with a numerical value. If
the condition is fulfilled, the TNC continues the program at the label
that is programmed after the condition (for information on labels see
also ”Labeling Subprograms and Program Section Repeats” on page
174). If it is not fulfilled, the TNC continues with the next block.
To call another program as a subprogram, enter PGM CALL after the
block with the target label.
Unconditional jumps
An unconditional jump is programmed by entering a conditional jump
whose condition is always true. Example:
FN9: IF+10 EQU+10 GOTO LBL1
Programming If-Then decisions
If-Then decisions appear when the Q function key is pressed, and after
selection with the GOTO key or the arrow keys. The TNC displays the
following dialogs:
Function
FN9: IF EQUAL, JUMP
Example: FN9: IF +Q1 EQU +Q3 GOTO LBL 5
If the two values or parameters are equal, jump to the
given label.
FN10: IF NOT EQUAL, JUMP
Example: FN10: IF +10 NE –Q5 GOTO LBL 10
If the two values or parameters are not equal, jump to
the given label.
FN11: IF GREATER THAN, JUMP
Example: FN11: IF+Q1 GT+10 GOTO LBL 5
If the first parameter or value is greater than the
second value or parameter, jump to the given label.
FN12: IF LESS THAN, JUMP
Example: FN12: IF+Q5 LT+0 GOTO LBL 1
If the first value or parameter is less than the second
value or parameter, jump to the given label.