Siemens SINUMERIK 840D sl Programming Manual page 443

Nc programming

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Logic operator

Bit-by-bit logic operator

In arithmetic expressions, the execution order of all the operators can be specified by

parentheses, in order to override the normal priority rules.

Spaces must be left between BOOLEAN operands and operators.

The operator B_NOT only refers to one operand. This is located after the operator.

Example 1: Comparison operators

IF R10>=100 GOTOF DEST

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

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

Exclusive OR

Bit-by-bit AND

Bit-by-bit OR

Bit-by-bit negation

Bit-by-bit exclusive OR

Work preparation

3.1 Flexible NC programming

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Sinumerik 840de sl