Water Level monitoring with CAI Webcontrol

The main program is distingurished by
START
END
 
subroutine started with its name using letters no longer than 10 characters, followed by a ":".  subroutine's name can not be any opcode or operand defined in the user guiide section 6.2 and 6.3.  subroutine must closed with "RET"
 
Subroutine normally declared after END.  It can be called in the main program by CALLSUB call.  From one subroutine, you can call another subroutine. The max level of nested subroutine calls is 8.
 
LEVEL is not a opcode, nor operand, so that it can be used for subroutine name.
 
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