Rockwell-automation 1771-DB BASIC MODULE Manual de usuario descargar pdf (Pagina 114)

Chapter

Expressions, Variables and Operators

9 -4

Operator Function Page

ABS

return the absolute value of expression 9 -11

+ add expressions together 9 -5

ASC return integer value of ASCII character 9 -14

ATN return arctangent of argument 9 -11

@ or # communication direction 9 -17

CBY retrieve data from core or program memory address location 9 -18

CHR convert numeric expression to ASCII value 9 -16

COS return the cosine of argument 9 -10

DBY retrieve/assign data to/from internal data memory 9 -18

divide first expression by second expression 9 -5

EOF test for empty input buffer 9 -17

EXP raise e to power of argument 9 -13

** raise first expression by the power of the second expression 9 -5

FREE list available bytes in RAM 9 -17

INT return integer portion of expression 9 -12

LEN list amount of bytes in current program 9 -17

LOG ( ) return the natural log of the argument 9 -13

.AND. combine the first expression with the second expression using .AND. 9 -7

.OR. combine the first expression with the second expression using .OR. 9 -8

.XOR. combine the first expression with the second expression using .XOR. 9 -8

MTOP return last valid memory address 9 -18

* multiply expressions together 9 -5

– negation 9 -6

NOT returns the one’s complement or inverse of the number 9 -11

store constant. PI 9 -12

RND return a pseudo–random number 9 -12

SGN return the sign of argument 9 -12

SIN return the sine of argument 9 -10

SQR return the square root of the argument 9 -12

– subtract one expression from another 9 -5

TAN return the tangent of argument 9 -10

TIME read/assign the free running clock 9 -19

XBY read/assign external data memory 9 -19

= allow the first expression to equal the second expression 9 -9

< allow the first expression to be less than the second expression 9 -9

<= allow the first expression to be less than or equal to the second expression 9 -9

> allow the first expression to be greater than the second expression 9 -9

>= allow the first expression to be greater than or equal to the second expression 9 -9

<> allows the first expression to be unequal to the second expression 9 -9

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