Xylem System 5000 BASIC Manual - Manual (Page 19)

17
Basic Commands and Functions
Returns the result (return value) of the most recent PRINT to either a serial or ethernet
connection. If an error has occurred, this number will be less than zero. A successful PRINT
returns the number of characters written to the open connection. This may be most useful for
detecting disconnected serial or network ports.
OPEN
PRINT CEIL(4.7) REM prints “5”
CHECKRETURN ( )
Closes a file, serial/com port, or network/ethernet connection that has been previously opened
with the OPEN command.
OPEN “COM2” AS #9
CLOSE #9
OPEN “SiteID.csv” FOR APPENDING AS #1
CLOSE #1
OPEN “192.168.0.1:80” AS #4
CLOSE #4
CLOSE
Returns the number’s ASCII character representation. ASC( ), converting a character to its ASCII
numerical value, is the opposite function of CHR$( ).
PRINT CHR$(65) REM prints “A”
PRINT ASC(“A”) REM prints “65”
CHR$ (number)
Clears the current time period’s SDI-12 cache. Using prior to a GETVALUE SDIXX command
forces the GETVALUE command to retrieve new SDI-12 measurements.
CLEARSDI() REM Clear any cached SDI values for this time period
GETVALUE SDI01, a1$ REM request a new measurement (address 0, param 1)
GETVALUE SDI02, a2$ REM retrieve the second parameter
CLEARSDI() REM Force our next request to be a new measurement
GETVALUE SDI01, b1$ REM request a new measurement (address 0, param 1)
CLEARSDI ( )