1
04.00 Flexible NC Programming
1.7 Com
arison and lo
ic o
erators
1
840D
NCU 571
840D
NCU 572
NCU 573
FM-NC 810D 840Di
ï›™
Siemens AG 2000. All rights reserved
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA)
−
04.00 Edition
1-41
1.7 Comparison and logic operators
Comparison operators
The comparison operators can be used for variables
of types CHAR, INT, REAL and BOOL. The code
value is compared with the CHAR type.
The following are possible with types STRING, AXIS
and FRAME: == and <>.
The result of a comparison operation is always type
BOOL.
Comparison operations can be used, for example, to
formulate a jump condition. Complex expressions
can also be compared.
Meaning of the comparison operators
== Equal to
<> Not equal to
> Greater than
< Less than
>= Greater than or equal to
<= Less than or equal to
<< Chaining of strings
Programming example
IF R10>=100 GOTOF DEST
or
R11=R10>=100
IF R11 GOTOF DEST
The result of the comparison R10>=100 is first
buffered in R11.
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