DTAT
Function Block - Generate a pulse at given date and time
Inputs
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Input |
Data type |
Description |
|
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
|
Output |
Data type |
Description |
|
QAT |
BOOL |
Pulse signal. |
|
QPAST |
BOOL |
TRUE if elapsed. |
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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.
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DTAT |
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IEC 61131-3 Automation platform > Programming - Reference guide > Advanced operations > Real Time Clock management functions > DTAT |
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