Rockwell-automation 1771-DB BASIC MODULE Manual de usuario descargar pdf (Pagina 118)

Chapter

Expressions, Variables and Operators

9 -8

.OR.

Use the bitwise .OR. operator to perform a bitwise OR on two expressions.

The .OR. operator compares the bits of the two expressions and sets the bit

to 1 (true) if either of bits being compared is set to 1 (true).

>PRINT

1.OR.4

Result: 5

This example performs a bitwise OR on the integers 1 and 4 and prints the

result. First, BASIC converts 1 and 4 to binary:

1 = 0001

4 = 0100

Then the BASIC module compares each digit of the binary number to

determine if either of the bits is set to a 1. For example, the last digit of the

first operand is 1 (true) and the last digit of the second operand is 0 (false)

so the resulting bit is set to 1.

0001

0100

0101

The BASIC module converts the resulting binary number back into an

integer and prints the result

0101 = 5

.XOR.

Use the bitwise .XOR. operator to perform an exclusive OR on two

expressions. The .XOR. compares the two bits of the expressions and sets

the bit to 1 (true) only if one of the bits in the comparison is set to 1 (true).

>PRINT

7.XOR.6

Result: 1

This example performs a bitwise XOR on the integers 7 and 6 and prints

the result. First, BASIC converts 7 and 6 to binary:

7 = 0111

6 = 0110

Then the BASIC module compares each digit of the binary number to

determine if only one of the bits is set to a 1. For example, the second digit

of first operand is 1 (true) and the second digit of the second operand is 1

(true) so the resulting bit is set to 0 (false) because both digits are set to 1.

0111

0110

0001

The BASIC module converts the resulting binary number back into an

integer and prints the result.

0001 = 1

1 2 ... 113 114 115 116 117 118 119 120 121 122 123 ... 393 394

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