Basic commands & functions – Xylem System 5000 BASIC Manual User Manual
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A logical operator used between two expressions in conditional statements (e.g. if, while, etc).
Returns TRUE if either the left, right, or both expressions are TRUE, FALSE if both are FALSE.
var = 100
IF (var > 0 OR var < 50) PRINT “Small”
REM prints “Small”
IF (var > 0 OR var < 150) PRINT “Large”
REM prints “Large”
OR
A read-only constant containing the number 3.1415926535897932.
var = PI REM stores 3.14159 in var
PI
Writes characters to a file, serial/com port, network/ethernet connection or standard output. If
the PRINT statement is used without specifying an open file, serial port (#X), or ethernet
connection, the output is sent to the System 5000™ terminal. Generally, this will only be useful
while troubleshooting Basic programs. An automatic carriage return and line feed (\r\n) are
added to all PRINT statements unless the statement is ended with a semicolon (;). The USING
statement may also be appended for added precision or to set the number of digits to print
(specified with hashes “#”).
Serial communication:
PRINT “OPENING COM2” REM prints to terminal
OPEN “COM2” AS #4 REM “COM2” and “COM 2” are identical
REM Wake up the H-3531 sensor by sending a character
PRINT #4 “W” REM Wakes up our sensor
INPUT #4 6000, H3531$
REM retrieve our measurements (6 sec timeout)
PRINT H3531$
REM print our results to the terminal
CLOSE #4
File communication:
PRINT “OPENING SiteID.csv” REM prints to terminal
OPEN “SiteID.csv” FOR WRITING AS #1
REM WRITING mode creates a new file
PRINT #1 “Digital2,AC-In” REM newline automatically added
var = 1
var2 = 256.25
var3 = 12.565
REM following line prints “1,256.25”
PRINT #1 var, “,”, var2, “,”;
REM newline not added
PRINT #1 var3 USING “##.##” REM prints “12.57” followed by a newline
PRINT #1 “Done”
REM newline automatically added
CLOSE #1
BASIC COMMANDS & FUNCTIONS