Sensaphone SCADA 3000 Users manual - Manual (Page 198)

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SCADA 3000 User’s Manual
4) for (x=0;x<60;x=x+1)
This line initializes the index variable (x) to zero, checks to see if it is less than 60, runs the next
line, and then increments x by one. This line creates a loop that runs the following line until x
reaches 60.
5)
total = total + numbers[x];
This line of the program is very important. It eliminates having sixty lines of programming to
get a total of all the minute readings. The x serves to automatically read in the next value for
each element in the array. For example:
The value of x is 6 (meaning it is minute 6, incremented in step
4).
The value of input 0 for minute 6 will be read into the array
and added to the total of the other 5 minutes.
The value of input 0 at minute 6 is 70.
Therefore: numbers[6] = 70
If the previous total was, say 351, then: total = 351 +
70
The new total is 421: total = 421
6) When x reaches 60, the FOR loop is finished and the average is calculated.
average = total/60;
eRROR HANDLING
When a program is compiled it is scanned for language related errors. When an error is
encountered, the ERROR is displayed followed by the line number. The line number may not
be the exact line that contains the error. Sometimes an error is detected a line or two after the
actual mistake. If an error occurs while compiling, the compiler aborts. It is possible to pass
the compiler with no errors, but receive an error when the program is running. A run time
error occurs when the syntax of a built-in function is incorrect. When a run time error occurs,
the program will not run correctly.
Listed below are the possible compiling errors:
Description
Syntax
Semicolon expected
Unbalanced braces
Parentheses expected
While expected
Quote expected
Variable not found
Too many variables defined (limit is 1024)
Bracket expected
Compiled file too big
Reserved word declared as variable