Siemens SINUMERIK 840D sl Programming Manual page 443

Logic operator
AND
OR
NOT
XOR
Bit-by-bit logic operator
B_AND
B_OR
B_NOT
B_XOR
Note
In arithmetic expressions, the execution order of all the operators can be specified by
parentheses, in order to override the normal priority rules.
Note
Spaces must be left between BOOLEAN operands and operators.
Note
The operator B_NOT only refers to one operand. This is located after the operator.
Examples
Example 1: Comparison operators
IF R10>=100 GOTOF DEST
or
R11=R10>=100
IF R11 GOTOF DEST
The result of the R10>=100 comparison is first buffered in R11.
Example 2: Logic operators
IF (R10<50) AND ($AA_IM[X]>=17.5) GOTOF DESTINATION
or
IF NOT R10 GOTOB START
NOT only refers to one operand.
Example 3: Bit-by-bit logic operators
IF $MC_RESET_MODE_MASK B_AND 'B10000' GOTOF
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Meaning
AND
OR
Negation
Exclusive OR
Meaning
Bit-by-bit AND
Bit-by-bit OR
Bit-by-bit negation
Bit-by-bit exclusive OR
Work preparation
3.1 Flexible NC programming
ACT_PLANE
443