Rockwell-automation 1771-DB BASIC MODULE Uživatelský manuál stáhnout pdf (Strana 123)

100

101

Chapter

Expressions, Variables and Operators

9 -13

The BASIC module contains a complete set of logarithmic operators.

These operators are one-operand operators.

LOG

Use the LOG operator to return the natural logarithm of the argument.

The argument must be greater than 0. This calculation is carried out to 7

significant digits.

>PRINT LOG(12) Result:

2.484906

>PRINT LOG(EXP(1)) Result: 1

If you need base 10 log, use this expression:

log

(x)=log(x)/log(10)

EXP

Use the EXP operator to raise the number e (2.7182818) to the power of

the argument. This operator is the inverse of the LOG operator. The EXP

operator is similar to the ** operator in that it raises a number to a power.

However, it is different from the ** operator in that the only number that is

raised is 2.7182818. (See also ** page 9 -5.)

>PRINT EXP(1) Result:

2.7182818

>PRINT EXP(2) Result:

7.3890559

>PRINT EXP(3) Result:

20.0855362

>PRINT EXP(LOG(2)) Result

: 2

Logarithmic Operators

1 2 ... 118 119 120 121 122 123 124 125 126 127 128 ... 393 394

Komentáře k této Příručce

Žádné komentáře

Rockwell-automation 1771-DB BASIC MODULE Uživatelský manuál Strana 123

Komentáře k této Příručce

Související produkty a manuály pro Zařízení Rockwell-automation 1771-DB BASIC MODULE