DTAt

Function Block A function block groups an algorithm and a set of private data. It has inputs and outputs. - Generate a pulse When the step gets activated, the action is activated for a single execution, and possibly once again when the step is deactivated. at designated time stamp (date and time).

Inputs

Input	Data Type	Range	Unit	Default	Description
Year	DINT	1900 to 2200	Years	No default	Year of the time stamp (e.g., 2006).
Month	DINT	1 to 12	Months	No default	Month of the time stamp (1 = January).
Day	DINT	1 to 31	Days	No default	Day of the time stamp .
TmOfDay	TIME	0 to 86,399,999	Milliseconds	No default	Time of day of the time stamp.
RST	BOOL	TRUE, FALSE	N/A	No default	Reset New start of the microprocessor. command.

Outputs

Output	Data Type	Range	Unit	Description
QAt	BOOL	TRUE, FALSE	N/A	Pulse signal.
QPast	BOOL	TRUE, FALSE	N/A	True if elapsed.

Remarks

The real-time clock Clock signal. may not be available on all controller hardware models.
See the controller hardware specifications for real-time clock availability.

Parameters are not updated constantly.
They are taken into account when only:
- The first time the block is called.
- When the reset input (RST) is TRUE.
In these two situations, the outputs are reset to FALSE.
- The first time the block is called with RST=FALSE and the specified date/stamp is passed:
  - The output QPAST is set to TRUE.
  - The output QAT is set to TRUE for one cycle only (pulse signal).
Highest units are ignored if set to 0 (zero).
- Example: If arguments are year=0, month=0, day = 3, tmofday=t#10h, the block triggers on the next 3rd day of the month at 10h.

FBD Language Example

FFLD Language Example

In the FFLD Language, the block is activated only if the input rung is TRUE.
Called only if EN if TRUE.

IL Language Example

(* MyDTAT is a declared instance of DTAT function A function calculates a result according to the current value of its inputs. 
A function has no internal data and is not linked to declared instances. block. *)
Op1: CAL
MyDTAT (YEAR, MONTH, DAY, TMOFDAY, RST)
FFLD  MyDTAT.QAT
ST Structured text - A high-level language that is block structured and syntactically resembles Pascal.  QAT
FFLD  MyDTATA.QPAST
ST  QPAST

ST Language Example

(* MyDTAT is a declared instance of DTAT function block. *)
MyDTAT (YEAR, MONTH, DAY, TMOFDAY, RST);
QAT := MyDTAT.QAT;
QPAST := MyDTATA.QPAST;