DQM function 300 determines the difference between two date/time
values and stores that value in the UMF tag.
The dates must be in a supported date format. If the first date
is later than the second, the difference result is set to zero.
This
function does not have any correction procedures.
Parameters
- Comparison Type
- Type of comparison unit.
- S
- Compares the difference in seconds.
- D
- Compares the difference days.
- M
- Compares the difference in months.
- Y
- Compares the difference in years.
- First Date Element
- The XPath location of the first UMF tag name to compare.
- Values can also be:
- DATE
- The current date.
- DATETIME
- The current date and time.
- Second Date Element
- The XPath location of the second UMF tag name to compare.
- Values can also be:
- DATE
- The current date.
- DATETIME
- The current date and time.
- Add to Result
- Number of comparison unit to add to the result.
Exception codes
Exception Code |
Description |
Severity* |
-3 |
One or both the dates are invalid. |
3 |
-2 |
The date comparison unit type is not valid. |
3 |
-1 |
One or both of the comparison dates are empty. |
3 |
1 |
The date difference was calculated and stored. |
0 |