Rockwell Automation 1746-BAS BASIC LANGUAGE - Manual (Page 33)

Publication 1746-RM001A-US-P
Expressions and Operators 3-11
RND
Use the RND operator to return a pseudo-random number in the range between 0
and 1 inclusive. The RND operator uses a 16-bit binary seed and generates 65536
pseudo-random numbers before repeating the sequence. The numbers generated
are specifically between 0/65535 and 65535/65535 inclusive.
Logarithmic Operators The module contains a complete set of logarithmic operators. These operators are
single-operand operators.
LOG([expr])
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.
If base 10 logs are needed, the following expression may be used:
log
10
(x)=log(x)/log(10)
The log is natural.
EXP([expr])
Use the EXP operator to raise the number e (2.7182818) to the power of the
argument.
IMPORTANT
Unlike most BASIC languages, the RND operator in the module
does not require an argument or a dummy argument. If an
argument is placed after the RND operator, a bad syntax error
occurs.
Example Result
>PRINT RND .26771954
Example Result
>PRINT LOG(12) 2.484906
>PRINT LOG(EXP(1)) 1
Example Result
>PRINT EXP(1) 2.7182818
>PRINT EXP(LOG(2)) 2