====== CTD_ULINT ======

{{:en:mervis-ide:35-help:ctd_ulint.png}}

===== Block name =====

CTD_ULINT

===== ST call =====

<code st-iec>
PROGRAM CTD_ULINT_DEMO
  VAR
     BOOL1,BOOL2,BOOL3: BOOL;
    ULINT1,ULINT2: ULINT;
   FB:CTD_ULINT;
  END_VAR
    FB(CD:=BOOL1,LD:=BOOL2,PV:=ULINT1,Q=>BOOL3,CV=>ULINT2);
END_PROGRAM
</code>

===== Description =====

The block acts as a counter counting down to zero from the preset value //pv//.

===== Inputs =====

|Input|Type |Description                                 |Default value|
|CD   |BOOL |Rising edge counts one down                 |False        |
|LD   |BOOL |Sets the counter to its initial value //pv//|False        |
|PV   |ULINT|Initial value of the counter                |0            |

===== Outputs =====

|Output|Type |Description                                                              |
|Q     |BOOL |State when the counter finished counting (counting finished: //q//=true).|
|CV    |ULINT|Current value of the counter                                             |

===== Application example =====

{{:en:mervis-ide:35-help:ctd_ulint_example.png}}