HEIDENHAIN SW 54843x-02 DIN Programming - Manual (Page 398)

398 DIN programming
4.32 Conditional bloc
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n 4.32 Conditional block run
Program branching IF..THEN..ELSE..ENDIF
A conditional branch consists of the elements:
 IF, followed by a condition. The condition includes a variable or
mathematical expression on either side of the relational operator.
 THEN. If the condition is fulfilled, the THEN branch is executed.
 ELSE. If the condition is not fulfilled, the ELSE branch is executed.
 ENDIF concludes the conditional program branch.
Interrogate bitset: You can also use the BITSET function as
condition. The function returns 1 if the numerical value contains the
requested bit. The function returns 0 if the numerical value does not
contain the requested bit.
Syntax: BITSET (x,y)
 x: Bit number (0 to 15)
 y: Numerical value (0 to 65535)
The relationship between bit number and numerical value is shown in
the table at right. You can also use variables for x, y.
Programming:
 Select "Extras > DINplus word...". The control opens the "Insert DIN
PLUS word" selection list.
 Select IF.
 Enter the condition.
 Insert NC blocks of the THEN branch.
 If required: Insert NC blocks of the ELSE branch.
Relational operators
< Less than
<= Less than or equal to
<> Not equal to
> Greater than
>= Greater than or equal to
== Equal to
Combining conditions:
AND Logical AND operation
OR Logical OR operation
Bit
which means
numerical
value
Bit
which means
numerical
value
0 1 8 256
1 2 9 512
2 4 10 1024
3 8 11 2048
4 16 12 4096
5 32 13 8192
6 64 14 16384
7 128 15 32768
Example: IF..THEN..ELSE..ENDIF
N.. IF (#l1==1) AND (#g250>50)
N.. THEN
N.. G0 X100 Z100
N.. ELSE
N.. G0 X0 Z0
N.. ENDIF
. . .
N.. IF 1==BITSET(0,#l1)
N.. THEN
N.. PRINT("bit 0: OK")
. . .
 NC blocks with IF, THEN, ELSE, ENDIF can have no
further commands.
 You can combine up to two conditions.