VC10Calendar
V = Variables
C = Calculation functions
The VC10Calendar function calculates the day of the week (iin numerical form see the Note) starting from the date expressed as day, month and year starting from 1/1/2000.
The function sets a negative value if you passed a wrong topic. The value determines the type of error.
IMPLEMENTATION
VC10Calendar (day, month, year, numday)
Parameters:
| IN/OUT | VARIABLE TYPE | EXAMPLE NAME | DIM | |
|---|---|---|---|---|
| IN | SYSTEM | day | L | Number of the day (1÷31) |
| IN | SYSTEM | month | L | Number of the month (1÷12) |
| IN | SYSTEM | year | L | Year - 4 digits - (from 2000 onwards) |
| OUT | SYSTEM | numday | L | Day of the week expressed in number: 0 = Sunday 1 = Monday 2 = Tuesday 3 = Wednesday 4 = Thursday 5 = Friday 6 = Saturday |
Error
If there was any data entry error would be reported on the numday variable with negative values. In particular:
-1 = error in entering the day
-2 = error in entering the month
-3 = error in entering the year
-4 = error in entering the day February month
Example
In the example, If the day of the week of June 19, 2002 is Wednesday, it activates 'ofUscita' output.
day = 19 month = 6 year = 2002 VC10Calendar (day, month, year, numday) IF (numday EQ 3) SETOUT ofUscita ENDIF
Note
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The function execute a WAIT a time every 180 milliseconds