Xylem STORM 3 Basic Programming manual - Manual (Page 30)

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COMMANDS AND FUNCTIONS
ENDIF
ON var GOTO critical,moderate,okay
LABEL critical
SETVALUE DIGITAL1, 1
SETVALUE DIGITAL2, 1
SETVALUE DIGITAL3, 1
END
LABEL moderate
SETVALUE DIGITAL1, 0
SETVALUE DIGITAL2, 1
SETVALUE DIGITAL3, 1
END
LABEL okay
SETVALUE DIGITAL1, 0
SETVALUE DIGITAL2, 0
SETVALUE DIGITAL3, 1
END
Opens a file, serial port, or connects to a listening port.All files and non-listening ports will be
automatically closed when a program ends.
Files may be opened with one of three modes: READING, WRITING, or APPENDING. A file opened
with WRITING mode will create a new file if the file doesn’t exist, or erase the contents of an
existing file. To prevent overwriting of an existing file, use APPENDING for write operations of an
existing file. An alternativeOPEN syntax may be used to determine if a file exists, as shown below
in the file example.
Serial ports are opened with the following defaults: baud rate = 9600, data bits = 8, parity =
none, stop bits = 1, flow control = none, transmit char delay = 0, transmit line delay = 0. If other
port settings are desired, they must be specified prior to opening the port using the SETPORT
command, as shown below in the serial port example.
Listening ports are opened with settings specified in the interface under Outputs > Communication
Ports Setup. The CLOSE command has no effect on a listening port. When communication occurs
on a listening port, the assigned Basic program will be initiated. To send and receive data across
the port, use the OPEN command as detailed in the example below. Subsequent INPUT and PRINT
commands will read and write to the open port.
OPEN