| Function Name |
SUB_DATE_DATE |
|---|---|
|
Description |
Subtracts an date input from another date input to provide a time output. |
|
Arguments |
Input 1 {DATE} Input 2 {DATE} For more information on the data types for the inputs and outputs, see Data Type Hierarchy. |
|
Returns |
Output {TIME} The Output is the result of Input 1 - Input 2 |
Example:
Function Block Diagram - SUB_DATE_DATE:
A SUB_DATE_DATE function has 2 inputs (in this case, 2 constants):
- Input 1 is set to D#2006-03-30
- Input 2 is set to D#2005-03-21.
The SUB_DATE_DATE function returns a time value of 374d as 2006-03-30 minus 2005-03-21 = 374 days.
ST Program - SUB_DATE_DATE:
The syntax for a SUB_DATE_DATE function in an ST Program is:
- Output := SUB_DATE_DATE (Input 1, Input 2)
Where Output, Input 1 and Input 2 are defined as variables earlier in the ST program. Input 1 and Input 2 are date and time values and the Output is a time value.