Xylem System 5000 BASIC Manual - Manual (Page 45)

Basic Commands and Functions
43
Sets the provided Task’s most recent timestamp to the given number or string. If an unknown Task
is specified, no value will be stored.
REM Find the Maximum value within the last four entries and set our
REM most recent entry to that datetimestamp and maximum value
Task$ = “myTask”
TaskMax = 0
TaskMaxDate$ = “”
FOR i = 1 TO 4
‘ get our time and date
GETTIMESTAMP Task$ i, Timestamp$
GETTASK Task$ i, TaskValue$
‘ Compare our Max values
TaskValue
= VAL(TaskValue$)
IF (TaskMax == 0 OR TaskValue > TaskMax) THEN
TaskMax = TaskValue
TaskMaxDate$ = Timestamp$
ENDIF
NEXT i
SETTASK Task$, TaskMax
SETTIMESTAMP Task$, TaskMaxDate$
SETTIMESTAMP
Used to change current hardware settings. Available parameters are DIGITALX (Digital Port Level),
COUNTERX (Event Counter), QUADXX (Quadrature Counter), and 420MA (4-20mA Output) where
X is a number indicating the requested port. An optional SLOTX may be specified for option cards
(if not, the daughterboard is presumed), followed by the requested value. Note also that Counter
values should be integer (non-decimal) values.
a = 16.0
SETVALUE DIGITAL1 SLOT3, a REM sets Digital port 1 on Slot 3 high
SETVALUE
Returns an integer (-1, 0, or 1) indicating the sign (negative, zero, or positive respectively) of the
given number.
var = SGN(-32.645) REM stores -1
var = SGN(1023.98) REM stores 1
SGN (number)
SETTASK
Sets the provided Task’s most recent value to the given number or string. If an unknown Task is
specified, no value will be stored.
task$ = “myTask”
GETTASK task$, a
SETTASK “myTask”, a * 2 REM doubles the last measurement value of myTask