If-Then Decisions With Q Parameters; Application; Unconditional Jumps; Programming If-Then Decisions - HEIDENHAIN TNC 620 User Manual

9
Programming: Q Parameters
9.6

If-then decisions with Q parameters

9.6 If-then decisions with Q parameters

Application

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 "Labeling Subprograms and Program Section Repeats",
page 256). If it is not fulfilled, the TNC continues with the next
block.
To call another program as a subprogram, enter a PGM CALL
program 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:
FN 9: IF+10 EQU+10 GOTO LBL1

Programming if-then decisions

Press the JUMP soft key to call the if-then conditions. The TNC
then displays the following soft keys:
Function
FN 9: IF EQUAL, JUMP
e.g. FN 9: IF +Q1 EQU +Q3 GOTO LBL
"UPCAN25"
If both values or parameters are equal, jump to
specified label
FN 9: IF UNDEFINED, JUMP
e.g. FN 9: IF +Q1 IS UNDEFINED GOTO LBL
"UPCAN25"
If the given parameter is undefined, jump to the
specified label
FN 9: IF DEFINED, JUMP
e.g. FN 9: IF +Q1 IS DEFINED GOTO LBL
"UPCAN25"
If the given parameter is defined, jump to the
specified label
FN 10: IF NOT EQUAL TO, JUMP
e.g. FN 10: IF +10 NE –Q5 GOTO LBL 10
If both values or parameters are not equal, jump
to specified label
FN 11: IF GREATER, JUMP
e.g. FN 11: IF+Q1 GT+10 GOTO LBL 5
If the first value or parameter is greater than the
second value or parameter, jump to specified
label
FN 12: IF SMALLER, JUMP
e.g. FN 12: IF+Q5 LT+0 GOTO LBL "ANYNAME"
If the first value or parameter is smaller than the
second value or parameter, jump to specified
label
280
Soft key
HEIDENHAIN Conversational Programming | 3/2014
TNC 620 | User's Manual