Rockwell-automation 1746-BAS BASIC LANGUAGE User Manual download pdf (Page 118)

Publication 1746-RM001A-US-P

9-2 Math and Backplane Conversion Functions

CALL 15 – 16-Bit

Unsigned Integer to

BASIC Floating-Point

Purpose

Use CALL 15 to convert an SLC 500 controller 16-bit unsigned integer number to

a module floating-point number. The input argument is the address number (0 to

207) of the word in the module input buffer to be converted. The output argument

is the converted value.

Syntax

PUSH [word number of module input buffer]

CALL 15

POP [converted value]

Example

>1 REM EXAMPLE PROGRAM

>50 PUSH 9 : REM CONVERT 10TH WORD OF BASIC INPUT BUFFER

>60 CALL 15 : REM DO 16-BIT UNSIGNED INTEGER TO

F.P. CONVERSION

>70 POP W : REM GET CONVERTED VALUE

>80 PRINT W

>RUN

READY

CALL 24 – BASIC

Floating-Point to 16-Bit

Signed Integer

Purpose

Use CALL 24 to convert a module floating–point number to a signed 16-bit

integer and place the result in the module output buffer. The first value PUSHed is

the data variable. The second value PUSHed is the address number (0 to 207) of

the word in the module output buffer.

The fractional part of the module floating-point value is truncated. If the module

floating-point value is less than –32768, the value placed in the module output

buffer is –32768. If the module floating-point value is greater than +32767, the

value placed in the module output buffer is +32767. The programmer is

responsible for checking the range of the number before conversion.

IMPORTANT

If an attempt is made to write to word 200 of the BASIC output

buffer, an error message is displayed and the module returns to

Command mode. The bits of word 200 are defined.

1 2 ... 113 114 115 116 117 118 119 120 121 122 123 ... 279 280

No comments

Rockwell-automation 1746-BAS BASIC LANGUAGE User Manual Page 118