DTAT

Function Block - Generate a pulse at given date and time

Inputs

YEAR : DINT     Wished year (e.g. 2006)
MONTH : DINT    Wished month (1 = January)
DAY : DINT      Wished day (1 to 31)
TMOFDAY : TIME Wished time
RST : BOOL      Reset command

Outputs

QAT : BOOL Pulse signal
QPAST : BOOL True if elapsed

Important notes

Real Time clock may be not available on some targets. Please refer to OEM instructions for further details about available features.

Remarks

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, and the output QAT is set to TRUE for one cycle only (pulse signal).

Highest units are ignored if set to 0. For instance, if arguments are "year=0, month=0, day = 3, tmofday=t#10h" then the block will trigger on the next 3rd day of the month at 10h.

In LD language, the block is activated only if the input rung is TRUE..

ST Language

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

FBD Language

LD Language

(* Called only if EN is TRUE *)

IL Language:

(* MyDTAT is a declared instance of DTAT function block *)
Op1: CAL MyDTAT (YEAR, MONTH, DAY, TMOFDAY, RST)
     LD MyDTAT.QAT
     ST QAT
     LD MyDTATA.QPAST
     ST QPAST