Rockwell Automation 1746-BAS-T SLC 500 Basic Basic-T Modules - Manual (Page 54)

Publication 1746-UM004B-EN-P - December 2005
4-6 Programming Overview
Refer to the BASIC Language Reference Manual, publication
1747-RM001, for additional information on these statements.
BASIC Operators
BASIC operators are programming instructions that are executed
during Run mode. Typically these operators perform a predefined
operation on either variables or constants. Operators require either
one or two operands. The following table lists the BASIC
programming operators.
RETI RETURN from interrupt. RETI
RETURN RETURN from subroutine. RETURN
ST@ Store top of stack at user specified location. ST@ 1000H, ST@ A
STOP Break program execution. STOP
STRING Allocate memory for STRINGs. STRING 50, 10
Statement Function Examples
Operator Function Examples
ABS ( ) Return the absolute value of expression. ABS (-3)
( ) + ( ) Add expressions together. 1+1
ASC ( ) Return integer value of ASCII character. ASC (3)
ATN ( ) Return arraignment of argument. ATN (1)
CHR ( ) Convert numeric expression to ASCII value. CHR (65)
COS ( ) Return the cosine of argument. COS (0)
( ) / ( ) Divide first expression by second expression. 10/2
EOF Test for empty input buffer. IF (NOT(EOF))
EXP ( ) Raise number to power of argument. EXP (10)
( ) ** ( ) Raise first expression by the power of the second
expression. 2**4
FREE List available bytes in RAM. FREE=
GET Read console. P. GET
INT ( ) Return integer portion of expression. INT (3.2)
IP Read/assign IP register. IP=0
LEN List amount of bytes in current program. LEN
LOG ( ) Return the natural log of the argument. LOG (10)
( ) .AND. ( ) Combine the first expression with the second expression
using .AND.. 10.AND.5