Subtraction of duration from date & time

This function block subtracts a duration from a time value of the data type Date&Time. The output value is a time value of the type Date&Time.

If the difference is below the limit of the time value Date&Time (1-1-1970 00:00:00) the value 1-1-1970 00:00:00 is given back as output value.


Name I/O Type(s) Function
IN1 I DT Date&time
IN2 I TIME Duration
OUT O DT Calculated value date&time